İnşaat Mühendisliği
2017 |
Hizal, Çağlayan; Ceylan, Hasan; Karaman, Mustafa; Turan, Gürsoy; Ecemis, Nurhan Modal Parameter Identification of a Ten Story Soil Structure Interaction Model Inproceedings 2017. @inproceedings{inproceedings33, title = {Modal Parameter Identification of a Ten Story Soil Structure Interaction Model}, author = {Çağlayan Hizal and Hasan Ceylan and Mustafa Karaman and Gürsoy Turan and Nurhan Ecemis}, year = {2017}, date = {2017-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Turan, Gürsoy Modal Identification With A Limited Number Of Sensors By Using Two Different Identification Techniques Inproceedings 2017. @inproceedings{inproceedings34, title = {Modal Identification With A Limited Number Of Sensors By Using Two Different Identification Techniques}, author = {Gürsoy Turan}, year = {2017}, date = {2017-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Turan, Gürsoy Modal Identification With A Limited Number Of Sensors By Using Two Different Identification Techniques Inproceedings 2017. @inproceedings{inproceedings35, title = {Modal Identification With A Limited Number Of Sensors By Using Two Different Identification Techniques}, author = {Gürsoy Turan}, year = {2017}, date = {2017-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Gençer, Funda Uygun; Turan, Mine; Vardaroglu, Mustafa; Aktaş, Engin KARYA, ALÄ°NDA VE LATMOS’DAKÄ° Ä°KÄ° HELENÄ°STÄ°K KULENÄ°N YAPISAL DAYANIMININ DEÄERLENDÄ°RÄ°LMESÄ° Inproceedings 2017. @inproceedings{inproceedings39, title = {KARYA, ALÄ°NDA VE LATMOS’DAKÄ° Ä°KÄ° HELENÄ°STÄ°K KULENÄ°N YAPISAL DAYANIMININ DEÄERLENDÄ°RÄ°LMESÄ°}, author = {Funda Uygun Gençer and Mine Turan and Mustafa Vardaroglu and Engin Aktaş}, year = {2017}, date = {2017-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Karaman, Mustafa; Ecemis, Nurhan; Görevlisi, Araştirma; Yüksek, Ä°zmir; Enstitüsü, Teknoloji; Tr, ; Doktor, Doçent KUM-LASTÄ°K KIRPINTI ÇAPININ VE KARIÅIM ORANININ SIVILAÅMA POTANSÄ°YELÄ°NE ETKÄ°SÄ°NÄ°N SARSMA TABLASI DENEYLERÄ° Ä°LE Ä°NCELENMESÄ° INVESTIGATION OF THE EFFECT OF SAND-TIRE CHIPS MIXTURE ON LIQUEFACTION POTENTIAL WITH SHAKE TABLE TESTS Inproceedings 2017. @inproceedings{inproceedings44, title = {KUM-LASTÄ°K KIRPINTI ÇAPININ VE KARIÅIM ORANININ SIVILAÅMA POTANSÄ°YELÄ°NE ETKÄ°SÄ°NÄ°N SARSMA TABLASI DENEYLERÄ° Ä°LE Ä°NCELENMESÄ° INVESTIGATION OF THE EFFECT OF SAND-TIRE CHIPS MIXTURE ON LIQUEFACTION POTENTIAL WITH SHAKE TABLE TESTS}, author = {Mustafa Karaman and Nurhan Ecemis and Araştirma Görevlisi and Ä°zmir Yüksek and Teknoloji Enstitüsü and Tr and Doçent Doktor}, year = {2017}, date = {2017-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
2016 |
Gunduz, Orhan; Bakar, Coskun; Simsek, Celalettin; Baba, Alper; Elci, Alper; Gurleyuk, Hakan; Mutlu, Merdiye; Cakir, Ayse The Health Risk Associated with Chronic Diseases in Villages with High Arsenic Levels in Drinking Water Supplies Journal Article Exposure and Health, 9 (4), pp. 261–273, 2016. @article{Gunduz2016, title = {The Health Risk Associated with Chronic Diseases in Villages with High Arsenic Levels in Drinking Water Supplies}, author = {Orhan Gunduz and Coskun Bakar and Celalettin Simsek and Alper Baba and Alper Elci and Hakan Gurleyuk and Merdiye Mutlu and Ayse Cakir}, url = {https://doi.org/10.1007/s12403-016-0238-2}, doi = {10.1007/s12403-016-0238-2}, year = {2016}, date = {2016-12-01}, journal = {Exposure and Health}, volume = {9}, number = {4}, pages = {261--273}, publisher = {Springer Nature}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Aksoy, Hafzullah; Eris, Ebru; Tayfur, Gokmen Empirical Sediment Transport Models Based on Indoor Rainfall Simulator and Erosion Flume Experimental Data Journal Article Land Degradation & Development, 28 (4), pp. 1320–1328, 2016. @article{Aksoy2016, title = {Empirical Sediment Transport Models Based on Indoor Rainfall Simulator and Erosion Flume Experimental Data}, author = {Hafzullah Aksoy and Ebru Eris and Gokmen Tayfur}, url = {https://doi.org/10.1002/ldr.2555}, doi = {10.1002/ldr.2555}, year = {2016}, date = {2016-06-01}, journal = {Land Degradation & Development}, volume = {28}, number = {4}, pages = {1320--1328}, publisher = {Wiley}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Erzin, Yusuf; Ecemis, Nurhan The use of neural networks for the prediction of cone penetration resistance of silty sands Journal Article Neural Computing and Applications, 28 (S1), pp. 727–736, 2016. @article{Erzin2016, title = {The use of neural networks for the prediction of cone penetration resistance of silty sands}, author = {Yusuf Erzin and Nurhan Ecemis}, url = {https://doi.org/10.1007/s00521-016-2371-z}, doi = {10.1007/s00521-016-2371-z}, year = {2016}, date = {2016-06-01}, journal = {Neural Computing and Applications}, volume = {28}, number = {S1}, pages = {727--736}, publisher = {Springer Science and Business Media LLC}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Ulke, Asli; Tayfur, Gokmen; Ozkul, Sevinc Water Resources Management, 31 (3), pp. 739–764, 2016. @article{Ulke2016, title = {Investigating a Suitable Empirical Model and Performing Regional Analysis for the Suspended Sediment Load Prediction in Major Rivers of the Aegean Region, Turkey}, author = {Asli Ulke and Gokmen Tayfur and Sevinc Ozkul}, url = {https://doi.org/10.1007/s11269-016-1357-z}, doi = {10.1007/s11269-016-1357-z}, year = {2016}, date = {2016-05-01}, journal = {Water Resources Management}, volume = {31}, number = {3}, pages = {739--764}, publisher = {Springer Science and Business Media LLC}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Rabet, Rita Sandrina; Simsek, Celalettin; Baba, Alper; Murathan, Alim Blowout mechanism of Alasehir (Turkey) geothermal field and its effects on groundwater chemistry Journal Article Environmental Earth Sciences, 76 (1), 2016. @article{Rabet2016, title = {Blowout mechanism of Alasehir (Turkey) geothermal field and its effects on groundwater chemistry}, author = {Rita Sandrina Rabet and Celalettin Simsek and Alper Baba and Alim Murathan}, url = {https://doi.org/10.1007/s12665-016-6334-6}, doi = {10.1007/s12665-016-6334-6}, year = {2016}, date = {2016-01-01}, journal = {Environmental Earth Sciences}, volume = {76}, number = {1}, publisher = {Springer Science and Business Media LLC}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Yacoub, Ely; Tayfur, Gokmen Evaluation and Assessment of Meteorological Drought by Different Methods in Trarza Region, Mauritania Journal Article Water Resources Management, 31 (3), pp. 825–845, 2016. @article{Yacoub2016, title = {Evaluation and Assessment of Meteorological Drought by Different Methods in Trarza Region, Mauritania}, author = {Ely Yacoub and Gokmen Tayfur}, url = {https://doi.org/10.1007/s11269-016-1510-8}, doi = {10.1007/s11269-016-1510-8}, year = {2016}, date = {2016-01-01}, journal = {Water Resources Management}, volume = {31}, number = {3}, pages = {825--845}, publisher = {Springer Science and Business Media LLC}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Erdem, Tahir Kemal; Bilgiç, E; Kanpara, Z An Investigation on the Factors Affecting the Range of Superplasticizers for Workable Self-Consolidating Grouts Inproceedings 2016. @inproceedings{inproceedings41, title = {An Investigation on the Factors Affecting the Range of Superplasticizers for Workable Self-Consolidating Grouts}, author = {Tahir Kemal Erdem and E Bilgiç and Z Kanpara}, year = {2016}, date = {2016-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Tayfur, Gokmen; Onoz, Bihrat; Cancelliere, Antonino; Garrote, Luis Editorial: Water Resources Management in a Changing World: Challenges and Opportunities Journal Article Water Resources Management, 30 , pp. 5553–5557, 2016. @article{Tayfur2016, title = {Editorial: Water Resources Management in a Changing World: Challenges and Opportunities}, author = {Gokmen Tayfur and Bihrat Onoz and Antonino Cancelliere and Luis Garrote}, doi = {10.1007/s11269-016-1565-6}, year = {2016}, date = {2016-01-01}, journal = {Water Resources Management}, volume = {30}, pages = {5553--5557}, abstract = {Although the science of water management has experienced significant improvements over the past century, many issues still require the attention of the scientific community. Global change, growing population and increasing pressure on existing water supplies have intensified the need for further improvement of water resources management practice. The purpose of this special issue is to present some of the latest research carried out in the area of water resources management under uncertain and changing conditions. Articles in this issue highlight recent advances in this area covering all the aspects of the hydrologic cycle. The articles in this special issue were submitted to Water Resources Management in response to an invitation by the scientific committee of the 9th World Congress of the European Water Resources Association held in Istanbul on 10-13 June 2015. A total of 31 contributions were invited among those presented in the congress and 19 papers were accepted for publication following the guidelines and standard review procedures of Water Resources Management. Articles contributed to this special issue are organized in three principal categories, each represented by a group of papers. A first category of papers deals with innovative tools and techniques for the analysis of complex hydrological processes that develop in space and time. The second group of papers deals with hydrologic extremes: floods and droughts, emphasizing the need to incorporate uncertainty and risk issues. The last category covers the challenges to the implementation of water resources management to solve practical problems, highlighting the importance of new approaches to face emerging challenges.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Although the science of water management has experienced significant improvements over the past century, many issues still require the attention of the scientific community. Global change, growing population and increasing pressure on existing water supplies have intensified the need for further improvement of water resources management practice. The purpose of this special issue is to present some of the latest research carried out in the area of water resources management under uncertain and changing conditions. Articles in this issue highlight recent advances in this area covering all the aspects of the hydrologic cycle. The articles in this special issue were submitted to Water Resources Management in response to an invitation by the scientific committee of the 9th World Congress of the European Water Resources Association held in Istanbul on 10-13 June 2015. A total of 31 contributions were invited among those presented in the congress and 19 papers were accepted for publication following the guidelines and standard review procedures of Water Resources Management. Articles contributed to this special issue are organized in three principal categories, each represented by a group of papers. A first category of papers deals with innovative tools and techniques for the analysis of complex hydrological processes that develop in space and time. The second group of papers deals with hydrologic extremes: floods and droughts, emphasizing the need to incorporate uncertainty and risk issues. The last category covers the challenges to the implementation of water resources management to solve practical problems, highlighting the importance of new approaches to face emerging challenges. |
Sanliyuksel Yucel, Deniz ; Balci, Nurgul; Baba, Alper Generation of Acid Mine Lakes Associated with Abandoned Coal Mines in Northwest Turkey Journal Article Archives of Environmental Contamination and Toxicology, 70 , 2016. @article{SanliyukselYucel2016, title = {Generation of Acid Mine Lakes Associated with Abandoned Coal Mines in Northwest Turkey}, author = {Deniz {Sanliyuksel Yucel} and Nurgul Balci and Alper Baba}, doi = {10.1007/s00244-016-0270-z}, year = {2016}, date = {2016-01-01}, journal = {Archives of Environmental Contamination and Toxicology}, volume = {70}, abstract = {A total of five acid mine lakes (AMLs) located in northwest Turkey were investigated using combined isotope, molecular, and geochemical techniques to identify geochemical processes controlling and promoting acid formation. All of the investigated lakes showed typical characteristics of an AML with low pH (2.59-3.79) and high electrical conductivity values (1040-6430 lS/cm), in addition to high sulfate (594-5370 mg/l) and metal (alu-minum [Al], iron [Fe], manganese [Mn], nickel [Ni], and zinc [Zn]) concentrations. Geochemical and isotope results showed that the acid-generation mechanism and source of sulfate in the lakes can change and depends on the age of the lakes. In the relatively older lakes (AMLs 1 through 3), biogeochemical Fe cycles seem to be the dominant process controlling metal concentration and pH of the water unlike in the younger lakes (AMLs 4 and 5). Bacterial species determined in an older lake (AML 2) indicate that biological oxidation and reduction of Fe and S are the dominant processes in the lakes. Furthermore, O and S isotopes of sulfate indicate that sulfate in the older mine lakes may be a product of much more complex oxidation/dissolution reactions. However, the major source of sulfate in the younger mine lakes is in situ pyrite oxidation catalyzed by Fe(III) produced by way of oxidation of Fe(II). Consistent with this, insignificant fractionation between d 34 S SO 4 and d 34 S FeS 2 values indicated that the oxidation of pyrite, along with dissolution and precipitation reactions of Fe(III) minerals, is the main reason for acid formation in the region. Overall, the results showed that acid generation during early stage formation of an AML associated with pyrite-rich mine waste is primarily controlled by the oxidation of pyrite with Fe cycles becoming the dominant processes regulating pH and metal cycles in the later stages of mine lake development. Acidic and highly metal-loaded effluents (acid mine drainage [AMD]) resulting from the exposure of pyrite and other metal sulfide minerals to weathering conditions are the principal environmental problems faced by the mining industry today (Dold and Spangerberg 2005).The formation mechanisms of AMD (e.g., oxidation of pyrite and other sulfide minerals) has been extensively studied (Nordstrom 1982; Taylor et al. 1984a, b; Evangelou and Zhang 1995; Nordstrom and Alpers 1999; Descostes et al.}, keywords = {}, pubstate = {published}, tppubtype = {article} } A total of five acid mine lakes (AMLs) located in northwest Turkey were investigated using combined isotope, molecular, and geochemical techniques to identify geochemical processes controlling and promoting acid formation. All of the investigated lakes showed typical characteristics of an AML with low pH (2.59-3.79) and high electrical conductivity values (1040-6430 lS/cm), in addition to high sulfate (594-5370 mg/l) and metal (alu-minum [Al], iron [Fe], manganese [Mn], nickel [Ni], and zinc [Zn]) concentrations. Geochemical and isotope results showed that the acid-generation mechanism and source of sulfate in the lakes can change and depends on the age of the lakes. In the relatively older lakes (AMLs 1 through 3), biogeochemical Fe cycles seem to be the dominant process controlling metal concentration and pH of the water unlike in the younger lakes (AMLs 4 and 5). Bacterial species determined in an older lake (AML 2) indicate that biological oxidation and reduction of Fe and S are the dominant processes in the lakes. Furthermore, O and S isotopes of sulfate indicate that sulfate in the older mine lakes may be a product of much more complex oxidation/dissolution reactions. However, the major source of sulfate in the younger mine lakes is in situ pyrite oxidation catalyzed by Fe(III) produced by way of oxidation of Fe(II). Consistent with this, insignificant fractionation between d 34 S SO 4 and d 34 S FeS 2 values indicated that the oxidation of pyrite, along with dissolution and precipitation reactions of Fe(III) minerals, is the main reason for acid formation in the region. Overall, the results showed that acid generation during early stage formation of an AML associated with pyrite-rich mine waste is primarily controlled by the oxidation of pyrite with Fe cycles becoming the dominant processes regulating pH and metal cycles in the later stages of mine lake development. Acidic and highly metal-loaded effluents (acid mine drainage [AMD]) resulting from the exposure of pyrite and other metal sulfide minerals to weathering conditions are the principal environmental problems faced by the mining industry today (Dold and Spangerberg 2005).The formation mechanisms of AMD (e.g., oxidation of pyrite and other sulfide minerals) has been extensively studied (Nordstrom 1982; Taylor et al. 1984a, b; Evangelou and Zhang 1995; Nordstrom and Alpers 1999; Descostes et al. |
BACANLI, Gulsen KIZIROGLU Berguzar OZBAHCECI Engin BİLYAY Selahattin Effect of Armor Crest Freeboard on Wave Overtopping For Different Type of Armor Units Inproceedings 2016. @inproceedings{inproceeding36, title = {Effect of Armor Crest Freeboard on Wave Overtopping For Different Type of Armor Units}, author = {Gulsen KIZIROGLU Berguzar OZBAHCECI Engin BİLYAY Selahattin BACANLI}, year = {2016}, date = {2016-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Akış, Erdönmez Özdemir Şengönül S S İ C M T Cardboard Bicycle Inproceedings 2016. @inproceedings{inproceeding38, title = {Cardboard Bicycle}, author = {Erdönmez Özdemir S S İ C. M. Şengönül T. Akış}, year = {2016}, date = {2016-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Erdem, Ali Topal Şevket Gümüştekin Reza Saleh Ahari Murat Tuyan Hasan Yavuz Ersöz Tahir Kemal Effects of Thixotropy Formwork Type and Release Agent on Self Consolidating Concrete Surface Defects Inproceedings 2016. @inproceedings{inproceeding39, title = {Effects of Thixotropy Formwork Type and Release Agent on Self Consolidating Concrete Surface Defects}, author = {Ali Topal Şevket Gümüştekin Reza Saleh Ahari Murat Tuyan Hasan Yavuz Ersöz Tahir Kemal Erdem}, year = {2016}, date = {2016-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Erdem, Kamal Khayat Mohammad Musa Alami Tahir Kemal H Development of a New Test Method to Evaluate Dynamic Stability of Self Consolidating Concrete Inproceedings 2016. @inproceedings{inproceeding40, title = {Development of a New Test Method to Evaluate Dynamic Stability of Self Consolidating Concrete}, author = {Kamal Khayat H Mohammad Musa Alami Tahir Kemal Erdem}, year = {2016}, date = {2016-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
N.A., Aktaş Karimzada E “Performance-Based Seismic Design of Reinforced Concrete Frame Buildings: A Direct Displacement Based Approach” Inproceedings 2016. @inproceedings{inproceeding41, title = {“Performance-Based Seismic Design of Reinforced Concrete Frame Buildings: A Direct Displacement Based Approach”}, author = {Aktaş E Karimzada N.A.}, year = {2016}, date = {2016-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
B., Aktaş Tanoğlu Artem Beylergil E M H S “Optimal design of compressed hydrogen storage vessels using multi-objective genetic algorithm” Inproceedings 2016. @inproceedings{inproceeding42, title = {“Optimal design of compressed hydrogen storage vessels using multi-objective genetic algorithm”}, author = {Aktaş Tanoğlu Artem E M H S Beylergil B.}, year = {2016}, date = {2016-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Ecemiş, Mustafa Karaman Nurhan 'Kumlarda tekrar sıvılaşma direncinin konsolidasyon karakterleri ile ilişkisi' Inproceedings 2016. @inproceedings{inproceeding43, title = {'Kumlarda tekrar sıvılaşma direncinin konsolidasyon karakterleri ile ilişkisi'}, author = {Mustafa Karaman Nurhan Ecemiş}, year = {2016}, date = {2016-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
A., GUNDUZ SIMSEK ELCI MURATHAN SÖZBİLİR BABA O C A A H High arsenic levels in groundwater resources of Gediz, Western Turkey, Arsenic Research and Global Sustainability Inproceedings 2016. @inproceedings{inproceeding44, title = {High arsenic levels in groundwater resources of Gediz, Western Turkey, Arsenic Research and Global Sustainability}, author = {GUNDUZ SIMSEK ELCI MURATHAN SÖZBİLİR O C A A H BABA A.}, year = {2016}, date = {2016-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
TAYFUR, Gökmen Dam break flood simulations using up-to-date technology.’ International Inproceedings 2016. @inproceedings{inproceeding46, title = {Dam break flood simulations using up-to-date technology.’ International}, author = {Gökmen TAYFUR}, year = {2016}, date = {2016-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
TAYFUR, Gökmen Akım derinliği verisi kullanan ve temel denklemlere dayanan bir yöntem ile geriye doğru taşkın öteleme.’ IV. Ulusal Taşkın Sempozyumu Inproceedings 2016. @inproceedings{inproceeding47, title = {Akım derinliği verisi kullanan ve temel denklemlere dayanan bir yöntem ile geriye doğru taşkın öteleme.’ IV. Ulusal Taşkın Sempozyumu}, author = {Gökmen TAYFUR}, year = {2016}, date = {2016-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Haltas, Ismail; Tayfur, Gokmen; Elci, Sebnem Two-dimensional numerical modeling of flood wave propagation in an urban area due to Ürkmez dam-break, Ä°zmir, Turkey Journal Article Natural Hazards, 81 (3), pp. 2103–2119, 2016. @article{Haltas2016, title = {Two-dimensional numerical modeling of flood wave propagation in an urban area due to Ürkmez dam-break, Ä°zmir, Turkey}, author = {Ismail Haltas and Gokmen Tayfur and Sebnem Elci}, url = {https://doi.org/10.1007/s11069-016-2175-6}, doi = {10.1007/s11069-016-2175-6}, year = {2016}, date = {2016-01-01}, journal = {Natural Hazards}, volume = {81}, number = {3}, pages = {2103--2119}, publisher = {Springer Science and Business Media LLC}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Beylergil, Bertan; Aktaş, Engin; Tanoğlu, Metin; Artem, H Optimal design of compressed hydrogen storage vessels using multi-objective genetic algorithm Inproceedings 2016. @inproceedings{inproceedings40, title = {Optimal design of compressed hydrogen storage vessels using multi-objective genetic algorithm}, author = {Bertan Beylergil and Engin Aktaş and Metin Tanoğlu and H Artem}, year = {2016}, date = {2016-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Yucel, Deniz Sanliyuksel; Baba, Alper Prediction of acid mine drainage generation potential of various lithologies using static tests: Etili coal mine (NW Turkey) as a case study Journal Article Environmental Monitoring and Assessment, 188 (8), 2016, ISSN: 15732959. @article{Yucel2016, title = {Prediction of acid mine drainage generation potential of various lithologies using static tests: Etili coal mine (NW Turkey) as a case study}, author = {Deniz Sanliyuksel Yucel and Alper Baba}, doi = {10.1007/s10661-016-5462-5}, issn = {15732959}, year = {2016}, date = {2016-01-01}, journal = {Environmental Monitoring and Assessment}, volume = {188}, number = {8}, abstract = {The Etili neighborhood in Can County (northwestern Turkey) has large reserves of coal and has been the site of many small- to medium-scale mining operations since the 1980s. Some of these have ceased working while others continue to operate. Once activities cease, the mining facilities and fields are usually abandoned without rehabilitation. The most significant environmental problem is acid mine drainage (AMD). This study was carried out to determine the acid generation potential of various lithological units in the Etili coal mine using static test methods. Seventeen samples were selected from areas with high acidic water concentrations: from different alteration zones belonging to volcanic rocks, from sedimentary rocks, and from coals and mine wastes. Static tests (paste pH, standard acid–base accounting, and net acid generation tests) were performed on these samples. The consistency of the static test results showed that oxidation of sulfide minerals, especially pyrite—which is widely found not only in the alteration zones of volcanic rocks but also in the coals and mine wastes—is the main factor controlling the generation of AMD in this mine. Lack of carbonate minerals in the region also increases the occurrence of AMD.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The Etili neighborhood in Can County (northwestern Turkey) has large reserves of coal and has been the site of many small- to medium-scale mining operations since the 1980s. Some of these have ceased working while others continue to operate. Once activities cease, the mining facilities and fields are usually abandoned without rehabilitation. The most significant environmental problem is acid mine drainage (AMD). This study was carried out to determine the acid generation potential of various lithological units in the Etili coal mine using static test methods. Seventeen samples were selected from areas with high acidic water concentrations: from different alteration zones belonging to volcanic rocks, from sedimentary rocks, and from coals and mine wastes. Static tests (paste pH, standard acid–base accounting, and net acid generation tests) were performed on these samples. The consistency of the static test results showed that oxidation of sulfide minerals, especially pyrite—which is widely found not only in the alteration zones of volcanic rocks but also in the coals and mine wastes—is the main factor controlling the generation of AMD in this mine. Lack of carbonate minerals in the region also increases the occurrence of AMD. |
Latifi, Nima; Rashid, Ahmad Safuan A; Ecemis, Nurhan; Tahir, Mahmood Md; Marto, Aminaton Time-dependent physicochemical characteristics of Malaysian residual soil stabilized with magnesium chloride solution Journal Article Arabian Journal of Geosciences, 9 (1), pp. 1–12, 2016, ISSN: 18667538. @article{Latifi2016, title = {Time-dependent physicochemical characteristics of Malaysian residual soil stabilized with magnesium chloride solution}, author = {Nima Latifi and Ahmad Safuan A Rashid and Nurhan Ecemis and Mahmood Md Tahir and Aminaton Marto}, doi = {10.1007/s12517-015-2100-4}, issn = {18667538}, year = {2016}, date = {2016-01-01}, journal = {Arabian Journal of Geosciences}, volume = {9}, number = {1}, pages = {1--12}, abstract = {The effects of non-traditional additives on the geotechnical properties of tropical soils have been the subject of investigation in recent years. This study investigates the strength development and micro-structural characteristics of tropical residual soil stabilized with magnesium chloride (MgCl2) solution. Unconfined compression strength (UCS) and standard direct shear tests were used to assess the strength and shear properties of the stabilized soil. In addition, the micro-structural characteristics of untreated and stabilized soil were discussed using various spectroscopic and microscopic techniques such as X-ray diffractometry (XRD), energy-dispersive X-ray spectrometry (EDAX), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR) and Brunauer, Emmett and Teller (BET) surface area analysis. From the engineering point of view, the results indicated that the strength of MgCl2-stabilized soil improved noticeably. The degree of improvement was approximately two times stronger than natural soil after a 7-day curing period. The results also concluded the use of 5 % of MgCl2 by dry weight of soil as the optimum amount for stabilization of the selected soil. In addition, the micro-structural study revealed that the stabilization process modified the porous network of the soil. The pores of the soils had been filled by the newly formed crystalline compounds known as magnesium aluminate hydrate (M-A-H).}, keywords = {}, pubstate = {published}, tppubtype = {article} } The effects of non-traditional additives on the geotechnical properties of tropical soils have been the subject of investigation in recent years. This study investigates the strength development and micro-structural characteristics of tropical residual soil stabilized with magnesium chloride (MgCl2) solution. Unconfined compression strength (UCS) and standard direct shear tests were used to assess the strength and shear properties of the stabilized soil. In addition, the micro-structural characteristics of untreated and stabilized soil were discussed using various spectroscopic and microscopic techniques such as X-ray diffractometry (XRD), energy-dispersive X-ray spectrometry (EDAX), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR) and Brunauer, Emmett and Teller (BET) surface area analysis. From the engineering point of view, the results indicated that the strength of MgCl2-stabilized soil improved noticeably. The degree of improvement was approximately two times stronger than natural soil after a 7-day curing period. The results also concluded the use of 5 % of MgCl2 by dry weight of soil as the optimum amount for stabilization of the selected soil. In addition, the micro-structural study revealed that the stabilization process modified the porous network of the soil. The pores of the soils had been filled by the newly formed crystalline compounds known as magnesium aluminate hydrate (M-A-H). |
Duran, Deniz; Özdemir, Iizzet Predicting and measuring surface enlargement in forward rod extrusion Journal Article Journal of Manufacturing Science and Engineering, Transactions of the ASME, 138 (7), 2016, ISSN: 15288935. @article{Duran2016, title = {Predicting and measuring surface enlargement in forward rod extrusion}, author = {Deniz Duran and Iizzet Özdemir}, url = {http://manufacturingscience.asmedigitalcollection.asme.org/pdfaccess.ashx?url=/data/journals/jmsefk/935094/}, doi = {10.1115/1.4032261}, issn = {15288935}, year = {2016}, date = {2016-01-01}, journal = {Journal of Manufacturing Science and Engineering, Transactions of the ASME}, volume = {138}, number = {7}, abstract = {Surface enlargement during bulk metal forming processes is one of the key parameters controlling the tribology at the tool-workpiece interface. Not only the surface roughness evolution but also the integrity of the lubricant layer critically reposes on surface enlargement. As an attempt to address this issue, in the first part of this work, a general, deformation gradient based surface enlargement description is implemented in a commercial finite element program. In the second part, forward rod extrusion tests with different area reductions are conducted using customized steel workpieces in which cylindrical copper rods are embedded through the depth. By sectioning the extruded parts and by identifying the position of the copper rods on the lateral surface, average surface enlargement values could be measured locally at different positions along the extrudate. Comparison of experiments and numerical predictions reveal that the deformation gradient based description performs reasonably well in capturing surface enlargement profiles both qualitatively and quantitatively.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Surface enlargement during bulk metal forming processes is one of the key parameters controlling the tribology at the tool-workpiece interface. Not only the surface roughness evolution but also the integrity of the lubricant layer critically reposes on surface enlargement. As an attempt to address this issue, in the first part of this work, a general, deformation gradient based surface enlargement description is implemented in a commercial finite element program. In the second part, forward rod extrusion tests with different area reductions are conducted using customized steel workpieces in which cylindrical copper rods are embedded through the depth. By sectioning the extruded parts and by identifying the position of the copper rods on the lateral surface, average surface enlargement values could be measured locally at different positions along the extrudate. Comparison of experiments and numerical predictions reveal that the deformation gradient based description performs reasonably well in capturing surface enlargement profiles both qualitatively and quantitatively. |
ç, El S; ç, Ekmek B Observational and numerical methods for quantifying and modeling of turbulence in a stratified reservoir Journal Article Journal of Applied Fluid Mechanics, 9 (4), pp. 1603–1614, 2016, ISSN: 17353645. @article{Elci2016, title = {Observational and numerical methods for quantifying and modeling of turbulence in a stratified reservoir}, author = {S El{ç}i and B Ekmek{ç}i}, url = {www.jafmonline.net,}, doi = {10.18869/acadpub.jafm.68.235.25112}, issn = {17353645}, year = {2016}, date = {2016-01-01}, journal = {Journal of Applied Fluid Mechanics}, volume = {9}, number = {4}, pages = {1603--1614}, abstract = {The interplay between stratification and shear in lakes controls the vertical mixing, which is the mostimportant mechanism affecting the transport of heat, salt, momentum and suspended and dissolvedsubstances. This study attempts to quantify and characterize the turbulence from direct measurementsconducted in a reservoir. A 3D numerical model is used to investigate the water column hydrodynamics forthe duration of measurements and the performance of various turbulence models used in the CFD model areinvestigated via simulation of mixing in the reservoir. The drawdown curves produced by the turbulencemodels are formulized through linear equations. Although, use of different turbulence models do not havesignificant effects on the flow hydrodynamics away from the intake structure; significant effects especially onturbulence kinetic energy production are observed at the orifice. Therefore, for simulation of withdrawalflow, either use of shear stress transport (SST) k-omega models solving equations all the way to the wall or kepsilonmodels with the nonequilibrium wall function is recommended to account for the changes in thepressure gradient. In this study, the methods using quantified turbulent characteristics of the flow toreformulate the Stokes' settling velocity to be applied in turbulent flows are also investigated. An approach topredict setting velocity in turbulent flows that utilizes acoustic Doppler instruments for quantification ofturbulent characteristics is presented. Modification of the Stokes' settling velocity with thenondimensionalized turbulent kinetic energy production profiles lead better results than other turbulencecharacteristics (buoyancy flux and by Richardson number flux) widely used in characterizing turbulentmixing.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The interplay between stratification and shear in lakes controls the vertical mixing, which is the mostimportant mechanism affecting the transport of heat, salt, momentum and suspended and dissolvedsubstances. This study attempts to quantify and characterize the turbulence from direct measurementsconducted in a reservoir. A 3D numerical model is used to investigate the water column hydrodynamics forthe duration of measurements and the performance of various turbulence models used in the CFD model areinvestigated via simulation of mixing in the reservoir. The drawdown curves produced by the turbulencemodels are formulized through linear equations. Although, use of different turbulence models do not havesignificant effects on the flow hydrodynamics away from the intake structure; significant effects especially onturbulence kinetic energy production are observed at the orifice. Therefore, for simulation of withdrawalflow, either use of shear stress transport (SST) k-omega models solving equations all the way to the wall or kepsilonmodels with the nonequilibrium wall function is recommended to account for the changes in thepressure gradient. In this study, the methods using quantified turbulent characteristics of the flow toreformulate the Stokes' settling velocity to be applied in turbulent flows are also investigated. An approach topredict setting velocity in turbulent flows that utilizes acoustic Doppler instruments for quantification ofturbulent characteristics is presented. Modification of the Stokes' settling velocity with thenondimensionalized turbulent kinetic energy production profiles lead better results than other turbulencecharacteristics (buoyancy flux and by Richardson number flux) widely used in characterizing turbulentmixing. |
Kosun, C; Tayfur, G; Celik, H M Soft computing and regression modelling approaches for link-capacity functions Journal Article Neural Network World, 26 (2), pp. 129–140, 2016, ISSN: 12100552. @article{Kosun2016, title = {Soft computing and regression modelling approaches for link-capacity functions}, author = {C Kosun and G Tayfur and H M Celik}, doi = {10.14311/NNW.2016.26.007}, issn = {12100552}, year = {2016}, date = {2016-01-01}, journal = {Neural Network World}, volume = {26}, number = {2}, pages = {129--140}, abstract = {Link-capacity functions are the relationships between the fundamental traffic variables like travel time and the flow rate. These relationships are important inputs to the capacity-restrained traffic assignment models. This study investigates the prediction of travel time as a function of several variables V/C (flow rate/capacity), retail activity, parking, number of bus stops and link type. For this purpose, the necessary data collected in Izmir, Turkey are employed by Artificial Neural Networks (ANNs) and Regression-based models of multiple linear regression (MLR) and multiple non-linear regression (MNLR). In ANNs modelling, 70% of the whole dataset is randomly selected for the training, whereas the rest is utilized in testing the model. Similarly, the same training dataset is employed in obtaining the optimal values of the coefficients of the regression-based models. Although all of the variables are used in the input vector of the models to predict the travel time, the most significant independent variables are found to be V/C and retail activity. By considering these two significant input variables, ANNs predicted the travel time with the correlation coefficient R = 0:87 while this value was almost 0.60 for the regression-based models.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Link-capacity functions are the relationships between the fundamental traffic variables like travel time and the flow rate. These relationships are important inputs to the capacity-restrained traffic assignment models. This study investigates the prediction of travel time as a function of several variables V/C (flow rate/capacity), retail activity, parking, number of bus stops and link type. For this purpose, the necessary data collected in Izmir, Turkey are employed by Artificial Neural Networks (ANNs) and Regression-based models of multiple linear regression (MLR) and multiple non-linear regression (MNLR). In ANNs modelling, 70% of the whole dataset is randomly selected for the training, whereas the rest is utilized in testing the model. Similarly, the same training dataset is employed in obtaining the optimal values of the coefficients of the regression-based models. Although all of the variables are used in the input vector of the models to predict the travel time, the most significant independent variables are found to be V/C and retail activity. By considering these two significant input variables, ANNs predicted the travel time with the correlation coefficient R = 0:87 while this value was almost 0.60 for the regression-based models. |
Aksoy, Hafzullah; Gedikli, Abdullah; Unal, Erdem N; Yilmaz, Murat; Eris, Ebru; Yoon, Jaeyoung; Tayfur, Gokmen Rainfall-Runoff Model Considering Microtopography Simulated in a Laboratory Erosion Flume Journal Article Water Resources Management, 30 (15), pp. 5609–5624, 2016, ISSN: 15731650. @article{Aksoy2016b, title = {Rainfall-Runoff Model Considering Microtopography Simulated in a Laboratory Erosion Flume}, author = {Hafzullah Aksoy and Abdullah Gedikli and Erdem N Unal and Murat Yilmaz and Ebru Eris and Jaeyoung Yoon and Gokmen Tayfur}, doi = {10.1007/s11269-016-1439-y}, issn = {15731650}, year = {2016}, date = {2016-01-01}, journal = {Water Resources Management}, volume = {30}, number = {15}, pages = {5609--5624}, abstract = {A comprehensive process-based rainfall-runoff model for simulating overland flow generated in rills and on interrill areas of a hillslope is evaluated using a laboratory experimental data set. For laboratory experiments, a rainfall simulator has been constructed together with a 6.50 m × 1.36 m erosion flume that can be given adjustable slopes changing between 5 % and 20 % in both longitudinal and lateral directions. The model is calibrated and validated using experimental data of simulated rainfall intensities between 45 and 105 mm/h. Results show that the model is capable of simulating the flow coming from the rill and interrill areas. It is found that most of the flow occurs in the form of rill flow. The hillslope-scale model can be used for better prediction of overland flow at the watershed-scale; it can also be used as a building block for an associated erosion and sediment transport model.}, keywords = {}, pubstate = {published}, tppubtype = {article} } A comprehensive process-based rainfall-runoff model for simulating overland flow generated in rills and on interrill areas of a hillslope is evaluated using a laboratory experimental data set. For laboratory experiments, a rainfall simulator has been constructed together with a 6.50 m × 1.36 m erosion flume that can be given adjustable slopes changing between 5 % and 20 % in both longitudinal and lateral directions. The model is calibrated and validated using experimental data of simulated rainfall intensities between 45 and 105 mm/h. Results show that the model is capable of simulating the flow coming from the rill and interrill areas. It is found that most of the flow occurs in the form of rill flow. The hillslope-scale model can be used for better prediction of overland flow at the watershed-scale; it can also be used as a building block for an associated erosion and sediment transport model. |
Haltas, Ismail; Gokmen Tayfur, •; Sebnem Elci, •; Elci, Sebnem Two-dimensional numerical modeling of flood wave propagation in an urban area due to U ¨ rkmez dam-break, I ˙ zmir, Turkey Journal Article Natural Hazards, 81 , pp. 2103–2119, 2016. @article{Haltas2016b, title = {Two-dimensional numerical modeling of flood wave propagation in an urban area due to U ¨ rkmez dam-break, I ˙ zmir, Turkey}, author = {Ismail Haltas and • {Gokmen Tayfur} and • {Sebnem Elci} and Sebnem Elci}, url = {http://naturalhazards.ntua.gr/}, doi = {10.1007/s11069-016-2175-6}, year = {2016}, date = {2016-01-01}, journal = {Natural Hazards}, volume = {81}, pages = {2103--2119}, abstract = {This study investigated flood inundation in an urban area due to a possible failure of U ¨ rkmez Dam in I ˙ zmir, Turkey. The estimation of flood hydrograph upon partial failure of the dam and routing of the flood hydrograph along the narrow valley downstream were first performed by the one-dimensional hydraulic routing model HEC-RAS. The two-dimensional hydraulic routing model FLO-2D is then used to simulate the spreading of the dam-break flood after the flood wave exits the valley. Land use and land cover digital maps were utilized to find the spatially varying roughness coefficient for the floodplain. The influence of the buildings on the flood propagation was represented in the numerical model by the area reduction factor as well as the width reduction factor. The peak flow depth, peak flow velocity and time moment of the peak flow depth maps were shown in the GIS environment. The results reveal that flow depths can reach about 3 m in the residential area. In about 40 min after the dam-break, houses in the large section of the town would be under the maximum flow depths. The two-dimensional hydrodynamic model results were tested against experimental dam-break flow data of the distorted physical model of U ¨ rkmez Dam, which is consisted of the reservoir, dam body and downstream area including U ¨ rkmez Town. The model successfully simulated experimental flow depth data measured at different measurement locations.}, keywords = {}, pubstate = {published}, tppubtype = {article} } This study investigated flood inundation in an urban area due to a possible failure of U ¨ rkmez Dam in I ˙ zmir, Turkey. The estimation of flood hydrograph upon partial failure of the dam and routing of the flood hydrograph along the narrow valley downstream were first performed by the one-dimensional hydraulic routing model HEC-RAS. The two-dimensional hydraulic routing model FLO-2D is then used to simulate the spreading of the dam-break flood after the flood wave exits the valley. Land use and land cover digital maps were utilized to find the spatially varying roughness coefficient for the floodplain. The influence of the buildings on the flood propagation was represented in the numerical model by the area reduction factor as well as the width reduction factor. The peak flow depth, peak flow velocity and time moment of the peak flow depth maps were shown in the GIS environment. The results reveal that flow depths can reach about 3 m in the residential area. In about 40 min after the dam-break, houses in the large section of the town would be under the maximum flow depths. The two-dimensional hydrodynamic model results were tested against experimental dam-break flow data of the distorted physical model of U ¨ rkmez Dam, which is consisted of the reservoir, dam body and downstream area including U ¨ rkmez Town. The model successfully simulated experimental flow depth data measured at different measurement locations. |
Haltas, Ismail; ç, Sebnem El; Gokmen Tayfur, {&} Numerical Simulation of Flood Wave Propagation in Two-Dimensions in Densely Populated Urban Areas due to Dam Break Journal Article Water Resources Management, 30 , pp. 5699–5721, 2016. @article{Haltas2016a, title = {Numerical Simulation of Flood Wave Propagation in Two-Dimensions in Densely Populated Urban Areas due to Dam Break}, author = {Ismail Haltas and Sebnem El{ç}i and {&} {Gokmen Tayfur}}, url = {http://www.flo-2d.com/}, doi = {10.1007/s11269-016-1344-4}, year = {2016}, date = {2016-01-01}, journal = {Water Resources Management}, volume = {30}, pages = {5699--5721}, abstract = {Dams are important structures having many functions such as water supply, flood control, hydroelectric power and recreation. Although dam break failures are very rare events, dams can fail with little warning and the damage at the downstream of the dam due to the flood wave can be catastrophic. During a dam failure, immense volume of water is mobilized at very high speed in a very short time. The momentum of the flood wave can turn to a very destructive impact force in residential areas. Therefore, from risk point of view, understanding the consequences of a possible dam failure is critically important. This study deals with the methodology utilized for predicting the flood wave occurring after the dam break and analyses the propagation of the flood wave downstream of the dam. The methodology used in this study includes creation of bathymetric, DEM and land use maps; routing of the flood wave along the valley using a 1D model; and two dimensional numerical modeling of the propagation and spreading of flood wave for various dam breaching scenarios in two different urban areas. Such a methodology is a vital tool for decision-making process since it takes into account the spatial heterogeneity of the basin parameters to predict flood wave propagation downstream of the dam. Proposed methodology is applied to two dams; Porsuk Dam located in Eskişehir and Alibey Dam located in Istanbul, Turkey. Both dams are selected based on the fact that they have dense residential areas downstream and such a failure would be disastrous in both cases. Model simulations based on three different dam breaching scenarios showed that maximum flow depth can reach to 5 m at the border of the residential areas both in Eskişehir and in Istanbul with a maximum flow velocity of 5 m/s and flood waves having 0.3 m height reach to the boundary of the residential area within 1 to 2 h. Flooded area in Eskişehir was estimated as 127 km 2 , whereas in Istanbul this area was 8.4 km 2 in total.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Dams are important structures having many functions such as water supply, flood control, hydroelectric power and recreation. Although dam break failures are very rare events, dams can fail with little warning and the damage at the downstream of the dam due to the flood wave can be catastrophic. During a dam failure, immense volume of water is mobilized at very high speed in a very short time. The momentum of the flood wave can turn to a very destructive impact force in residential areas. Therefore, from risk point of view, understanding the consequences of a possible dam failure is critically important. This study deals with the methodology utilized for predicting the flood wave occurring after the dam break and analyses the propagation of the flood wave downstream of the dam. The methodology used in this study includes creation of bathymetric, DEM and land use maps; routing of the flood wave along the valley using a 1D model; and two dimensional numerical modeling of the propagation and spreading of flood wave for various dam breaching scenarios in two different urban areas. Such a methodology is a vital tool for decision-making process since it takes into account the spatial heterogeneity of the basin parameters to predict flood wave propagation downstream of the dam. Proposed methodology is applied to two dams; Porsuk Dam located in Eskişehir and Alibey Dam located in Istanbul, Turkey. Both dams are selected based on the fact that they have dense residential areas downstream and such a failure would be disastrous in both cases. Model simulations based on three different dam breaching scenarios showed that maximum flow depth can reach to 5 m at the border of the residential areas both in Eskişehir and in Istanbul with a maximum flow velocity of 5 m/s and flood waves having 0.3 m height reach to the boundary of the residential area within 1 to 2 h. Flooded area in Eskişehir was estimated as 127 km 2 , whereas in Istanbul this area was 8.4 km 2 in total. |
Simonovski, Özdemir Yalçınkaya İ T I Strain Gradient Polycrystal Plasticity for Micro-forming Inproceedings 2016. @inproceedings{inproceeding37, title = {Strain Gradient Polycrystal Plasticity for Micro-forming}, author = {Özdemir İ T. Yalçınkaya I. Simonovski}, year = {2016}, date = {2016-01-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |