Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Sezer, İsmet(6)
- Yıldız, Barış(6)
- Ayaydin, Hasan(5)
- Caliskan, A.(5)
- Erbaş, Sefa(5)
- Pala, Fahrettin(5)
- Sancak, Kadir(5)
- Yildiz, Emel(5)
- Çalışır, Gülsüm(5)
- Abada, A.(4)
- Abbrescia, M.(4)
- Abdyukhanov, I.(4)
- Abramov, A.(4)
- Aburaia, M.(4)
- Agrawal, P.(4)
- Aiba, M.(4)
- Aichinger, I.(4)
- Aielli, G.(4)
- Akay, A.(4)
- Akhundov, A.(4)
- Aksakal, H.(4)
- Albergo, S.(4)
- Alekou, A.(4)
- Aleksa, M.(4)
- Aleksan, R.(4)
- Alexahin, Y.(4)
- Alioli, S.(4)
- Aliyazicioglu, Yuksel(4)
- Altmannshofer, W.(4)
- Ambrosio, G.(4)
- Amorim, D.(4)
- Amstutz, O.(4)
- Anderlini, L.(4)
- Andreazza, A.(4)
- Andreini, M.(4)
- Andriatis, A.(4)
- Andris, C.(4)
- Andronic, A.(4)
- Angelucci, M.(4)
- Antinori, F.(4)
Yayınlar
- MakaleYayıncıda açık erişim2019The investigation of different chicane applications in traffic calming studies using driving simulator; [Trafik sakinlestirme çalismalarinda farkli kivrimlama uygulamalarinin sürüş simülatörü ortaminda incelenmesi]
Aydin, Metin Mutlu; Akgöl, Kadir; Günay, Banihan
High vehicular speeds are one of the most frequent complains in urban roads. Lack of obedience to speed limits results in many fatal accidents. Traffic calming measures have been widely used in many developed countries to reduce accidents, the negative effects of speeding and traffic noise in urban roads. In the scope of this study, horizontal calming measures, namely chicanes, which are not in use in Turkey yet, have been studied by using a driving simulator for the aim of controlling and reducing vehicular speeds. For this purpose, Akdeniz University campus was selected as the pilot case area and a number of different roads in the campus have been modeled in 3D. It was determined from the speed data that for divided four lane carriageways, chicane number 10 (K10) which has 3 m effective width and 45 entry and exit angles, for undivided two lane carriageways, chicane number 2 (K2) which has 2.7 m effective width and 60 entry and 30 exit angles, gave the best outcome from the driving tests in accordance with the characteristics of Turkish drivers. Furthermore, based on the findings, common driver errors are identified and a number of recommendations are made.
- MakaleYalnız künye2019Thermal Multisensor Fusion for Collaborative Robotics
Benli, Emrah; Spidalieri, Richard Lee; Motai, Yuichi
Collaborative robotic configurations for monitoring and tracking human targets have attracted interest in the fourth industrial revolution. The fusion of different types of sensors embedded in collaborative robotic systems achieves high-quality information and contributes to significantly improve robotic perception. However, current methods have not deeply explored the capabilities of thermal multisensory configurations in human-oriented tasks. In this paper, we propose thermal multisensor fusion (TMF) for collaborative robots to overcome the limitations of stand-alone robots. Thermal vision helps to utilize the heat signature of the human body for human-oriented tracking. An omnidirectional (O-D) infrared (IR) sensor provides a wide field of view (FOV) to detect human targets, and Stereo IR helps determine the distance of the human target in the oriented direction. The fusion of O-D IR and Stereo IR also creates a multisensor stereo for an additional determination of the distance to the target. The fusion of thermal and O-D sensors brings their limited prediction accuracy with their advantages. The maximum a posteriori method is used to predict the distance of the target with high accuracy by using the distance results of TMF stereo from multiple platforms according to the reliability of the sensors rather than its usage of visible-band-based tracking methods. The proposed method tracks the distance calculation of each sensor instead of target trajectory tracking as in visible-band methods. We proved that TMF increases the perception of robots by offering a wide FOV and provides precise target localization for collaborative robots.
- MakaleYayıncıda açık erişim2019An experimental study on the compressive response of CFRP honeycombs with various cell configurations
Pehlivan, Levent; Baykasoğlu, Cengiz
The experimental investigation on the compressive response of carbon fiber reinforced polymer (CFRP) honeycombs with various cell configurations was carried out in the present work. The CFRP honeycomb specimens were manufactured by corrugation technique, in which the prepreg CFRP sheets were first corrugated into the certain shape using corrugated aluminum moulds under heat and pressure, and then the corrugated CFRP sheets were glued and stacked to construct honeycomb specimens. Twenty-seven groups of specimens were experimentally tested to examine the effects of cell geometry (i.e., square, circular, and hexagonal), cell wall thickness and height on the quasi-static out-of-plane crushing performance of the honeycombs. The square, circular, and hexagonal honeycomb specimen groups were designed to have almost the same weights. The results showed that the cell wall thickness is an significant parameters on the overal crushing response of the CFRP honeycombs while the out-of-plane compressive strenght of the honeycombs is generally independent of the height. It is observed that the hexagonal specimen groups have generally superior crushing performance in comparison with the square and circular counterparts due to their large double foil bonding surfaces. The experimental results also revealed that the crushing properties of the honeycomb structures with the core densities of 157–282 kg/m 3 could be increased more than two times with the appropriate selection of cell configurations.
- MakaleYalnız künye2019Adakite-like parental melt generation by partial fusion of juvenile lower crust, Sakarya Zone, NE Turkey: A far-field response to break-off of the southern Neotethyan oceanic lithosphere
Karsli, Orhan; Dokuz, Abdurrahman; Kandemir, Raif; Aydin, Faruk; Schmitt, Axel K.; Ersoy, E. Yalçın; Alyıldız, Cihangir
The timing of major tectonic events and the driving mechanisms for magma generation during Late Cenozoic convergence and collision between Arabia and Eurasia still remain unknown. The Sakarya Zone (SZ) in northern Turkey is a critical member of this collisional assemblage. In the easternmost part of the SZ, we have recognized a Late Miocene volcanic suite termed the Çağirankaya volcanics which displays characteristic post-collisional geochemical features. Here, we report a new data set of zircon U–Pb ages, whole-rock major and trace element, as well as Sr–Nd isotope analyses for dacite and andesite samples from the Çağirankaya volcanics. Zircon U–Pb ages for a selected dacitic sample average 5.16 ± 0.11 Ma (mean square of weighted deviates, MSWD = 0.45, n = 35), confirming a late Miocene age of this volcanic episode. The high-K calc-alkaline andesites and dacites exhibit an adakite-like geochemical signature, and are characterized by high Sr (424 to 552 ppm), Sr/Y ratios (31–43), and low Mg# (42 to 46) values, along with low Y (12–14 ppm) and heavy rare earth element (HREE) concentrations, that resemble those in adakites formed by partial melting of hot oceanic slab during subduction. Isotopic compositions are near bulk Earth (87Sr/86Sr(t) = 0.70482 to 0.70489, εNd(t) = +1.08 to +1.33), which rules out a solely asthenospheric origin. Elevated Nb/Ta (14 to 17) and K2O/Na2O (0.6–1.0) imply a juvenile mafic lower crustal source composed of ~20% garnet-bearing amphibolite. Geochemical modeling suggests that adakite-like parental melts were generated in the absence of subduction and without large-scale delamination of lower continental crust. Instead, our findings suggest that Late Miocene adakite-like volcanic rocks in the SZ formed in a post-collisional intra-continental setting, which experienced far-field extension after the subducted slab of the southern Neotethyan branch became detached in the collision zone. Asthenospheric upwelling and underplating of basaltic magma provided the heat for partial melting of lower crustal amphibolite, forming minor amounts of adakite-like melts in the SZ.
- MakaleAçık Erişim2019The effect of firm growth on brand value: Evidence from brand finance Turkey-100
Gerekan, Bilal; Pehlivan, Abdülkadir; Koçan, Mahmut
A variety of groups are increasingly using brand value for different purposes; thus, a range of consultancy firms calculate, by different methods, and publish brand values annually. The effect of many variables on brand value has been examined previously, but few studies have explored the relationship between brand value and firm growth. This study aims to bridge this gap in the literature, since this relationship is important to maximizing brand value. The research was based on the companies listed in Brand Finance Turkey-100 between 2012 and 2018. Sales, operating income, R&D, and marketing, selling, and distribution (MSD) expenditures were adopted as firm growth indicators, which revealed that: increasing operating income and MSD caused a significant increase in brand value, whereas increasing R&D reduced brand value; and there was no significant relationship between increased sales and brand value.
- MakaleAçık Erişim2019Experimental and numerical studies on axially loaded reinforced square hollow section T-joints
Ozyurt, E.; Das, S.
This paper presents outcomes of experimental and numerical studies completed on unreinforced, collar plate reinforced and doubler plate reinforced Square Hollow Section (SHS)T-joints subjected to axial compressive loading on the brace member. A total of nine full-scale SHS T-joint specimens were fabricated and tested, in which six specimens were reinforced with collar plate and doubler plate. Non-linear finite element (FE)models were developed using finite element code, ABAQUS. Test data was used to validate these FE models. Subsequently, validated FE models were used to conduct an extensive parametric study to investigate the effect of various geometrical parameters of main members and reinforcement plates on the ultimate capacity of reinforced SHS T-joints. The parametric study found that use of both collar and doubler plate reinforcements significantly increase the ultimate capacity of SHS T-joints. Thickness of the reinforcing plate has a positive effect if the thickness of the reinforcing plate is limited to twice the thickness of the chord member. This study, however, found that the capacity of a reinforced SHS T-joint is not dependent on the type of reinforcing plate. The study concludes that the maximum capacity that can be achieved from a reinforced joint is about double the capacity of a similar unreinforced joint. It was found that the Eurocode EN 1993-1-8 overestimates the capacity of reinforced SHS T-joints. Therefore, a new design method for predicting the ultimate capacity of the collar plate and doubler plate reinforced SHS T-joints was developed and this new design method is presented in this paper.
- MakaleYalnız künye2019Geochronology, geochemistry, and petrology of adakitic Pliocene–Quaternary volcanism in the Şebinkarahisar (Giresun) area, NE Turkey
Yücel, Cem
The Pliocene–Quaternary volcanics in NE Turkey are mainly hornblende–phyric trachyandesites having a narrow range of SiO 2 from 61.88 to 63.00 wt.% and exhibiting adakitic signatures with their Na 2 O (3.67–4.27 wt.%), Al 2 O 3 (16.19–16.80 wt.%), Y (14.1–16.5 ppm) contents and K 2 O/Na 2 O (0.87–1.12), Sr/Y (44.24–54.90), and La/Yb (36.80–43.88) ratios. Plagioclases as the main mineral phases show a wide range of compositions, and weak normal and reverse zoning. Hornblendes are generally edenite and pargasite (Mg#: 0.39–0.74). Clinopyroxenes are augite (Mg#: 0.58–0.76). Biotites have Mg# ranging from 0.45 to 0.66. The textural and compositional variations indicate disequilibrium crystallization possibly arising from magma mixing. The U–Pb zircon dating of the adakitic volcanics yielded 3.4–1.9 Ma. The studied rocks display moderate light rare earth element /heavy rare earth element ratios and enrichment in the lithophile element and depletion in high field strength element, implying that the parental magmas were derived from mantle sources previously enriched by slab-derived fluids and/or subducted sediments. The crystallization temperature and pressure estimations based on the clinopyroxene thermobarometry range from 1144 to 1186°C and from 3.92 to 7.97 kbar, respectively. Hornblende thermobarometry, oxygen fugacity, and hygrometer calculations yielded results as 908–993°C at a pressure of 2.87–5.22 kbar, water content of 4.4–8.4 wt.%, and relative oxygen fugacity (ΔNNO log units) of −0.6 to 0.9, respectively. Biotite thermobarometry suggests relatively higher oxygen fugacity conditions (10 –13.33 to 10 –17.60 ) at temperatures of 676–819°C and at pressures from 1.15 to 1.76 kbar. In the light of the obtained data and modelling, it can be concluded that the magmas of the adakitic volcanics were derived from enriched mantle source through relatively higher partial melting and experienced magma mixing with melts at the crustal level. Additionally, the fractional crystallization and assimilation-fractional crystallization processes may have played an important role during the evolution of the studied volcanics.
- MakaleYalnız künye2019Production and Characterization of Bacterial Cellulose from Citrus Peels
Güzel, Melih; Akpınar, Özlem
Cellulose is the most common polymer in the world, formed by β-1,4 linked glucopyranose units. In this study, citrus peels (lemon, mandarin, orange and grapefruit) were used for the production of bacterial cellulose (BC). The peels were hydrolyzed with dilute acid and hydrolysates were used for BC production. The production of BC was carried out at 28–32 °C for 21 days under static conditions with Komagataeibacter hansenii GA2016. BC yields were found to be between 2.06 and 3.92%. It was found that the FTIR spectra of the BCs produced in citrus peel hydrolysates were similar to BC produced in the commercially available nutrients. The result of this study showed that all the BCs produced from citrus peels were characterized to have high water holding capacity, thin fiber diameter, high the thermal stability and high crystallinity.
- Kitap BölümüYalnız künye2019Country of origin image and consumer knowledge effects on product evaluation and purchase intention
Izmir, Onur
Introduction Consumers daily face lots of purchase decisions when they are buying products and services (Bas et al., 2016). They rely on some certain elements of the products to make the right decision about which product to buy. Some rely on extrinsic cues such as brand, country of origin (COO), store name, and price, while others take into account intrinsic cues of the intended product such as taste, smell, design, and durability (Wall et al., 1991; Chao, 1998). Consumers are inclined to make inferences regarding a given product depending on the information and experience level that they have with it (Johansson et al., 1985; Han, 1989, 1990). There is a well-known positive relationship between price and the quality (Zeithaml, 1988). COO information also provides consumers with some insight about the quality of the product (Li and Wyer, 1994) as such consumers attribute some certain features to certain countries (Ahmed and d’Astous, 1993; Verlegh and Steenkamp, 1999). Consumers develop stereotypes concerning “made in” labels of the products (Han, 1990; Ahmed et al., 2004). For instance, Germany is famous for its high-quality and high-durability automobiles; Japan is a well-known country in terms of its high-technology products especially in electronics; Italy and France are good at design and fashion and so on. There is also a negative association between some countries and consumer’s perception. For example, Chinese products are perceived negatively in terms of quality (Verlegh and Steenkamp, 1999; Kinra, 2006; Kerboucheet al., 2012). As a consequence,….
- Kitap BölümüYalnız künye2019A conceptual view to corruption and broken windows Theory Approach
Yildiz, Baris
- MakaleYalnız künye2019The effectiveness of the monetary transmission mechanism channel in Turkey
Okur, Fatih; Akkuş, Ömer; Durmaz, Atakan
This study investigates on which channels the monetary transmission mechanism works effectively. In this context, quarterly data for the period 2005-2017 is used for Turkey and the variables used to determine the efficiency of the monetary transmission mechanism are analyzed by the VAR method. The obtained results indicate that the loans and reserves have a more effective role on the inflation as a channel of the monetary transmission mechanism. According to the long run results, while the exchange rate and reserves channel have a negative effect on the real GDP, it is revealed that loans have a positive effect on the real GDP in the long run stabilization.
- MakaleAçık Erişim2019Anticholinergic and antidiabetic effects of isoeugenol from clove (Eugenia caryophylata) oil
Topal, Fevzi
Isoeugenol (2-methoxy-4-(prop-1-en-1-yl)phenol), a component of from clove (Eugenia caryophylata) oil, is a starting material for both the biotechnological and synthetic production of vanillin and vanillic acid. In this article, the isoeugenol showed excellent inhibitory effects against some metabolic enzymes such as acetylcholinesterase (AChE) enzymes, α-glycosidase, and α-amylase. Isoeugenol has the IC50 values of 411.5 for α-amylase, 19.25 nM for α-glycosidase and 77.00 nM for AChE. Ki values of isoeugenol were found as 21 ± 9 nM and 16 ± 3 nM against α-glycosidase and AChE, respectively. On the other hand, tacrine as standard AChE inhibitor exhibited IC50 value of 20.38 nM. α-Glycosidase inhibitors, commonly referred to as starch blockers, are anti-diabetic drugs that help reduce edible blood glucose levels. AChE inhibitors are used for the treatment of some neurologic degenerational diseases, which involve Alzheimer’s disease. Also, there is a growing interest and the need to search for newer effective and safe AChE, α-amylase, and α-glycosidase inhibitors for the treatment of some metabolic disorder.
- MakaleAçık Erişim2019Search for excited muons at the future SpPC-based muon-proton colliders
Caliskan, A.
We have investigated the production potential of the spin-1/2 excited muons, predicted by preonic models, at the four SPPC (Super Proton-Proton Collider)-based muon-proton colliders in different center-of-mass energies. For the signal process µp → µ*X → µγX, the production cross section and the decay width values of the excited muons have been calculated. The pseudorapidity and transverse momentum distributions of muons and photons in the final state have been obtained in order to choose the kinematical cuts best suited for enhancing the statistical signal of the excited muon signature. By applying these cuts, we report the discovery, observation and exclusion mass limits of the excited muons for two compositeness scale values, which are an energy level at which new interactions are expected to occur. It is shown that the discovery limits on the excited muons in the case the compositeness scale equals 100 TeV are 2.7, 3.9, 3.1 and 6.7 TeV for center-of-mass energies of 10.3, 14.2, 14.6 and 20.2 TeV, respectively.
- Kitap BölümüYalnız künye2019Investigation of the effects of the disasters occurred between 2010 and 2017 on the world economy
Turan, Melikşah; Oral, Vildan; Kaya, Afşin Ahmet
Introduction Disasters cause losses in various dimensions throughout the world. They lead to social, psychological, political and cultural changes as well as economic burdens for countries. People have been facing disasters since the beginning of human history. Information about disasters occurring in different parts of the world has been found in the oldest known records. Thousands of people have lost their lives in these disasters. (Akgiray et al., 2004: 77). Natural disasters cause significant economic losses and the loss of life for countries (Erkal and Degerliyurt, 2009). According to the statistics in Turkey, natural disasters result in economic losses equal to 1.1 % of Gross National Product each year (Aktürk and Albeni, 2002). However, considering indirect economic losses such as loss of production and unemployment, total loss is estimated to be greater than 1 % of gross national product (Erkal and Degerliyurt, 2009). It is possible to estimate the economic effects of the disasters by considering factors which are affected by the disasters. When the 1999 Marmara Earthquakes in Turkey is evaluated in terms of both loss of income and loss of national wealth, the total estimated cost is between 9 million dollars and 13 billion dollars according to the State Planning Organization of Turkey and 6-10 billion dollars according to the World Bank (Akgiray et al., 2004: 77). Estimations about the economic effects of the 1999 Marmara Earthquakes suggest the following figures: the reconstruction of damaged buildings is estimated….
- MakaleYalnız künye2019Circuit implementation of nano-scale TiO2 memristor using only metal-oxide-semiconductor transistors
Gul, Fatih
A metal-oxide-semiconductor (MOS)-based circuit model that emulates a TiO2 memristor is proposed in this study. First, a TiO2 (10-nm active layer thickness)-based memristor device was fabricated. The structural properties of the device were confirmed via energy dispersive X-ray spectroscopy. The memristive characteristics of the device were resolved by applying a time-dependent voltage. The typical pinched hysteresis memristive loops of the current-voltage curves were obtained. After physical implementation and characterization of the device, a circuit model was implemented using only four MOS transistors to emulate the fabricated TiO2 memristor. In addition to emulating the fabricated memristor, the proposed circuit model is suitable for use in general memristor-based applications. No active element or circuit blocks were used in the circuit to achieve memristive characteristics. The simulation and experimental results are in good agreement; moreover, the circuit is very simple compared to those presented in previous studies in the literature and it was able to emulate the fabricated memristor. All simulations were completed using 180 nm TSMC CMOS process parameters.
- Kitap BölümüYalnız künye2019Eu-China relations: Current and future challenges and opportunities
Uğur, Ömer
While EU-China relations are often characterized by a clear divergence of values and political norms, the scope and size of the relationship between the two sides in the past twenty-five years has been remarkable. The basis of this development lies in the considerable expansion of the economic interaction and substantial growth in trade between the two sides since the early 1990. Relations between the EU and China are now so dense as well as complex. In this study, development of the relations between the EU and China will be discussed and it will also be expressed why and how much this relation is significant for both parties. While doing this, the main factors that enable the relations between the EU and China and that prevent aforementioned relations to deepen will be discussed and opportunities, expectations and problems these bring forth will be mentioned. Thus, this study will try to provide an answer why the EU and China experience significant conflicts and even come across each other from time to time in the recent years will be answered.
- Derleme MakaleYalnız künye2019Redescription and New Record of the Harvestman Lacinius insularis Roewer, 1923 (Opiliones: Phalangiidae) from Turkey
Kurt, Kemal; Yaǧmur, Ersen Aydin
Lacinius insularis Roewer, 1923, is recorded for the first time as part of the Turkish harvestmen fauna. Prior to this, the species was only known from the island of Crete in Greece. The new collections were made on Nif mountain in İzmir Province (far western Turkey). In this study, L. insularis is redescribed based on adults from Turkey. Its detailed description, morphological characteristics, distribution and measurements are given. Also, genitalia, body dorsal view, chelicerae, and pedipalp are illustrated. In addition, this species is compared with similar species.
- MakaleYalnız künye2019Effects of wood preservatives on the combustion process and combustion quality of wood
Sadiye Yasar, S.
This study examines the combustion properties of Scots pine (Pinus sylvestris L.) and Oriental beech (Fagus orientalis L.) in 3 stages (CWF, SC and EC) according to ASTM E 160-50 (1975). Wood samples were impregnated with Tanalith-E (T) and Wolmanit-CB (WC) and then were varnished with Synthetic (St) and water based (wb) varnishes. When the combustion was completed, the weight loss, combustion temperatures, illuminance values, total time of combustion, and demolition time were measured. As the result, illuminance value of Oriental beech wood decreased, while the smoke density increased. Scots pine was later destroyed in the combustion process. Areas with a risk of fire are advised to use pine wood instead of beech. Wolmanit-CB and synthetic varnish reduced the temperature and illuminance values. Oriental beech, Tanalith-E, and synthetic varnish resulted in the highest temperatures for all combustion stages. This triple interaction increased total combustion time values by more than 90% when compared with the control samples.
- MakaleAçık Erişim2019New desmid records from high mountain lakes in Artabel Lakes Nature Park, Gümüşhane, Turkey
Şahin, Bülent; Akar, Bülent
The algal flora of 17 lakes and 1 pond in the Artabel Lakes Nature Park were investigated during two summer seasons (2013 and 2016). In total, 26 desmid taxa were found and identified as new records for the desmid flora of Turkey based on their morphotaxonomic characteristics and ecological preferences. The taxa identified belong to the genera Actinotaenium (1), Closterium (1), Cosmarium (15), Micrasterias (1), Spondylosium (1), Staurastrum (5), Teilingia (1), and Tetmemorus (1). Morphotaxonomy, ecology, and distribution of each species were discussed in detail.
- MakaleYalnız künye2019A new use of the ant system algorithm for the max-mean dispersion problem
Cura, Tunchan; Özdemir, Muhlis
This study addresses an NP-hard problem known as the max-mean dispersion problem (MaxMeanDP), which belongs to a well-known class of diversity problems. In view of the increasing importance of parallel computing, this study proposes an ant system (AS) approach to the MaxMeanDP in which ants execute the search process in parallel. Moreover, by proposing a rather different use of the pheromone trail and visibility compared to the original AS, a new AS algorithm is introduced that runs in parallel. Our analysis indicates that the new use of the pheromone trail and visibility significantly contributes to the quality of the solution. The results show that the proposed method is effective, efficient and comparable to other approaches.