Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Article A New Discrete Differential Evolution Algorithm Coupled With Simulation–optimization Model for Groundwater Management Problems(Springer Science and Business Media Deutschland GmbH, 2024) Şahin, O.G.; Gündüz, Orhan; Gurarslan, G.; Gündüz, O.; 03.07. Department of Environmental Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyDiscrete differential evolution (DDE) is a promising algorithm specifically developed to solve discrete problems. In this study, we aim to apply DDE to groundwater management problems and to compare its performance and discrete space search capabilities with the well-known genetic algorithm (GA) techniques. Local search process was used to enhance the performance of GA algorithm. Metaheuristic algorithms are used for finding location of wells as a hybrid optimization procedure. Two examples from the groundwater management literature were selected to test the performance of the algorithm. The main novelty and objective of this study lie in the comparison of the discrete space search capabilities of the mentioned metaheuristics algorithms using the groundwater management problems. In the first test example, discrete space search performances of algorithms are 15% and 93% for GA and DDE, respectively. In the second test example, DDE exhibited a significantly higher test results (77%) compared to GA (1%). The analysis revealed that GA often prematurely converged and was insufficient to produce the optimum result. DDE reaches the solution considerably faster than the other algorithms. The results showed the superior performance of DDE in the discrete space. As the problem becomes more discrete, the performance of the DDE algorithm in finding the optimum solution increases considerably. Thus, it can be revealed that DDE can also be applied to a wider range of water resource management problems as an effective discrete optimization algorithm. © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2024.Conference Object Citation - WoS: 1Citation - Scopus: 3Structural Performance of R/C Buildings in 2023 Kahramanmaraş Earthquakes Under the Lens of Hassan Index(Springer Science and Business Media Deutschland GmbH, 2024) Dönmez, Cemalettin; Yesilyurt, Cennet; Gozun, Uveys; Ozturk, Baki; Donmez, Cemalettin; 01. Izmir Institute of Technology; 03. Faculty of Engineering; 03.03. Department of Civil EngineeringStarting with the 1999 Kocaeli Earthquake, seismic damage indices have been developed to quantify damage potential. The late Professor Mete Sozen played a significant role in this endeavor by introducing the Hassan Index, which is an indirect measure of the robustness of structures. Its calculation is straightforward, given the vertical structural element dimensions at ground level. Various earthquakes worldwide, from Taiwan to Chile, have provided opportunities to assess its effectiveness across diverse building practices and earthquake characteristics. Following the February 2023 Kahramanmaras Earthquakes, a reconnaissance team was dispatched to gather field data to observe the damages through the lens of the Hassan Index. The study extended to cover all major city and town centers, studying around 250 reinforced concrete buildings with 2-16 stories. These buildings were all constructed after the 2000s. Hence, the data set sheds light on the performance of Turkish construction practices after the commencement of the 1998 Turkish Building code and the following earthquake regulations. By evaluating the newly gathered data alongside the existing dataset, a basis is established to consider the Hassan Index as a preliminary design index rather than solely as a seismic damage index.Conference Object Citation - WoS: 2Citation - Scopus: 6Discussion on the Causes of the Observed Damages in the 2023 Kahramanmaraş Earthquakes(Springer Science and Business Media Deutschland GmbH, 2024) Dönmez, Cemalettin; Comlekoglu, Hakki Gurhan; Ozturk, Baki; Donmez, Cemalettin; 01. Izmir Institute of Technology; 03. Faculty of Engineering; 03.03. Department of Civil EngineeringThe devastating earthquakes in February 2023 in south-east Turkiye demonstrated that the Turkish built environment does not meet the needed performance. The frequency of earthquakes in Turkiye calls for urgent organization to upgrade the existing structures and avoid the repetition of deficient applications. Hence, it is necessary to identify the causes of the damage. The presented study concentrated on a subset of the existing inventory built under the governance of 1998 and later Turkish Earthquake Codes. Following the earthquakes in Kahramanmaras, Turkiye, a reconnaissance study was conducted to understand the causes of the damage incurred. The extensive study covered all the major city and town centers, specifically concentrating on the 2- to 16-story reinforced concrete buildings. The first impression of the data gathered indicates significant detailing imperfections. Poor drift control, inferior layout preferences, and non-structural detailing issues are the other suspects. The observed damage and the current seismic regulation requirements will be critically discussed to form a basis for possible future improvements to the seismic code.Book Part Micro-environment Establishment for Promoting Diverse Algal Growth(Springer Science and Business Media Deutschland GmbH, 2024) Sözmen,A.B.; 01. Izmir Institute of TechnologyAlgae offer sustainable sources for water, food, and energy production. They can remove pollutants and pathogens from wastewater and provide potable water. Also they can also be used in creating dietary supplements, functional foods, and biofuels. An optimal micro-environment is essential to promote their growth and productivity in specific applications, and for this purpose it is important to take various physical factors such as light, temperature, hydrodynamics, agitation, and shear stress and chemical factors such as nutrients, pH, and dissolved oxygen into consideration. These factors affect algae growth and productivity, both on their own and by a combinational affect. It is important to properly monitor and manage these factors to ensure optimal algae growth and productivity. This chapter provides an overview of physical and chemical factors that influence growth of algae, empha-sizing the importance of micro-environment management in promoting sustainable algae-based industries. It also includes the strategies that can be applied for this purpose, which covers the cultivation techniques and methods to manage cultivation microenvironment in terms of pH, nutrients, and dissolved oxygen. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.Book Part Fragrance Emissions Into the Air and Their Impact on Air Quality and Human Health(Springer Science and Business Media Deutschland GmbH, 2024) Balci,E.; Sofuoğlu, Aysun; Sofuoglu,A.; 03.02. Department of Chemical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyFragrances have been widely used in consumer products around the world, leading to their release into environmental compartments. Due to their volatility, fractions of fragrances in the air are subjected to volatilization, photolysis, and reaction with oxidation agents (O3, OH, Cl, and NO3 radicals), and can also be removed from the atmosphere via dry and wet deposition. Their vast distribution and presence in the air cause adverse effects on air quality, a crucial parameter that affects people and environmental health worldwide. Fragrances and their reaction products can enter the human body through inhalation, dermal contact, and ingestion and may pose a health threat. Recently, there has been rising concern over these chemicals’ negative effects. To address the questions about fragrances, this chapter provides systematic information on the occurrence and potential sources of fragrances, their fate in the air, and their effects on health, focusing on air chemistry. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.Article Citation - Scopus: 16Measurement of Prompt Open-Charm Production Cross Sections in Proton-Proton Collisions at √s = 13 Tev(Springer Science and Business Media Deutschland GmbH, 2021) Tumasyan,A.; Adam,W.; Ambrogi,F.; Bergauer,T.; Dragicevic,M.; Erö,J.; Spiridonov,A.; 01. Izmir Institute of TechnologyThe production cross sections for prompt open-charm mesons in proton-proton collisions at a center-of-mass energy of 13 TeV are reported. The measurement is performed using a data sample collected by the CMS experiment corresponding to an integrated luminosity of 29 nb−1. The differential production cross sections of the D∗±, D±, and D0(D ¯) mesons are presented in ranges of transverse momentum and pseudorapidity 4 < pT< 100 GeV and |η| < 2.1, respectively. The results are compared to several theoretical calculations and to previous measurements. [Figure not available: see fulltext.] © 2021, The Author(s).Article Citation - WoS: 24Citation - Scopus: 25Search for Supersymmetry in Pp Collisions at √s = 13 TeV in the Single-Lepton Final State Using the Sum of Masses of Large-Radius Jets(Springer Science and Business Media Deutschland GmbH, 2016) Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Woods, N.; 01. Izmir Institute of TechnologyResults are reported from a search for supersymmetric particles in protonproton collisions in the final state with a single, high transverse momentum lepton; multiple jets, including at least one b-tagged jet; and large missing transverse momentum. The data sample corresponds to an integrated luminosity of 2: 3 fb(-1) at root s = 13TeV, recorded by the CMS experiment at the LHC. The search focuses on processes leading to high jet multiplicities, such as gluino pair production with (g) over tilde -> t (t) over bar(chi) over tilde (0)(1) . The quantity M-J, defined as the sum of the masses of the large-radius jets in the event, is used in conjunction with other kinematic variables to provide discrimination between signal and background and as a key part of the background estimation method. The observed event yields in the signal regions in data are consistent with those expected for standard model backgrounds, estimated from control regions in data. Exclusion limits are obtained for a simplified model corresponding to gluino pair production with three-body decays into top quarks and neutralinos. Gluinos with a mass below 1600 GeV are excluded at a 95% confidence level for scenarios with low (chi) over tilde (0)(1) mass, and neutralinos with a mass below 800 GeV are excluded for a gluino mass of about 1300 GeV. For models with two-body gluino decays producing on-shell top squarks, the excluded region is only weakly sensitive to the top squark mass.Article Citation - WoS: 6Citation - Scopus: 7Engineering Free-Standing Electrospun Pllcl Fibers on Microfluidic Platform for Cell Alignment(Springer Science and Business Media Deutschland GmbH, 2024) Yildirim-Semerci,Ö.; Arslan-Yildiz,A.; 01. Izmir Institute of TechnologyHere, a PLLCL-on-chip platform was developed by direct electrospinning of poly (L-lactide-co-ε-caprolactone) (PLLCL) on polymethyl methacrylate (PMMA) microfluidic chips. Designed microchip provides the electrospinning of free-standing aligned PLLCL fibers which eliminates limitations of conventional electrospinning. Besides, aligned fiber structure favors cell alignment through contactless manipulation. Average fiber diameter, and fiber alignment was evaluated by SEM analyses, then, leakage profile of microchip was investigated. 3D cell culture studies were conducted using HeLa and NIH-3T3 cells, and nearly 85% cell viability was observed in PLLCL-on-chip for 15 days, while cell viability of 2D control started to decrease after 7 days based on Live dead and Alamar Blue analyses. These findings emphasize biocompatibility of PLLCL-on-chip platform for 3D cell culture and its ability to mimic extracellular matrix (ECM). Immunostaining results prove that PLLCL-on-chip platform favors the secretion of ECM proteins compared to control groups, and cytoskeletons of cells were in aligned orientation in PLLCL-on-chip, while they were in random orientation in control groups. Overall, these results demonstrate that the developed platform is suitable for the formation of various 3D cell culture models and a potential candidate for cell alignment studies. © The Author(s) 2024.Conference Object Citation - Scopus: 2Effect of Building Envelope and Environmental Variables on Building Energy Performance: Case of a Residential Building in Mediterranean Climate(Springer Science and Business Media Deutschland GmbH, 2023) Durmuş Arsan, Zeynep; Uçaryılmaz,S.; Arsan,Z.D.; 01. Izmir Institute of Technology; 02.02. Department of Architecture; 02. Faculty of ArchitectureAt least 30% of the World’s energy consumption and greenhouse gas emissions originate from buildings. Thus, design decisions should be well studied during the design phase of buildings following energy efficiency approaches. Environmental variables and properties of the building envelope are significant for energy efficiency. Thus, this study aims to investigate the potential of a residential building in the Mediterranean climate of İzmir, Turkey, regarding decreasing energy use and understanding the significance of architectural decisions during the design stage of buildings. Eight design scenarios were created by defining seven variables affecting energy consumption for room electricity, heating, and cooling. The first three scenarios focused on environmental-related variables, i.e., surrounding buildings, ground surface materials, and building orientation, while the last five scenarios investigated building envelope-related variables, i.e., thermal transmittance of the wall, floor and roof, glass, window frame, and door types, shading elements, and natural ventilation. Then, energy modeling and simulation are applied to test their potential for minimizing energy consumption. Research findings proposed that early architectural design decisions significantly influenced the case building’s energy performance. Thermal transmittance of the building components provided an annual energy saving of 22.4%, thus, was seen as the best-performed variable for the case building. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.Conference Object Citation - WoS: 1Citation - Scopus: 1Gpprmon: Gpu Runtime Memory Performance and Power Monitoring Tool(Springer Science and Business Media Deutschland GmbH, 2024) Öz, Işıl; Öz,I.; 01. Izmir Institute of Technology; 03.04. Department of Computer Engineering; 03. Faculty of EngineeringGraphics Processing Units (GPUs) perform highly efficient parallel execution for high-performance computation and embedded system domains. While performance concerns drive the main optimization efforts, power issues become important for energy-efficient GPU executions. While performance profilers and architectural simulators offer statistics about the target execution, they either present only performance metrics in a coarse kernel function level or lack visualization support that enables performance bottleneck analysis or performance-power consumption comparison. Evaluating both performance and power consumption dynamically at runtime and across GPU memory components enables a comprehensive tradeoff analysis for GPU architects and software developers. This paper presents a novel memory performance and power monitoring tool for GPU programs, GPPRMon, which performs a systematic metric collection and offers useful visualization views to track power and performance optimizations. Our simulation-based framework dynamically collects microarchitectural metrics by monitoring individual instructions and reports achieved performance and power consumption information at runtime. Our visualization interface presents spatial and temporal views of the execution. While the first demonstrates the performance and power metrics across GPU memory components, the latter shows the corresponding information at the instruction granularity in a timeline. Our case study reveals the potential usages of our tool in bottleneck identification and power consumption for a memory-intensive graph workload. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.