Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Gul, Muhammet(74)
- Akkurt, Nevzat(39)
- Celik, Erkan(35)
- Serdar, Osman(35)
- Güler, Ömer(33)
- Kutlu, Banu(32)
- Paksoy, Mehmet Yavuz(32)
- Yucesan, Melih(31)
- Tekin, H.O.(30)
- Yildirim, Numan(30)
- Yildirim, Nuran Cikcikoglu(30)
- ALMisned, Ghada(28)
- Mete, Suleyman(26)
- Danabas, Durali(20)
- Ince, Muharrem(20)
- Serin, Faruk(20)
- Ates, Mehmet(19)
- Can, Erkan(19)
- Onat, Onur(18)
- Benzer, Fulya(17)
- Kocabaş, Mehmet(17)
- Tanyol, Mehtap(17)
- Kizak, Volkan(16)
- Alataş, Mevlüt(15)
- Aydin, Rahmi(15)
- Kahraman, Gökhan(15)
- Kilic, G.(15)
- Polat, Alper(15)
- Susam, Selim Orhun(15)
- Xu, Qian(15)
- Aslan, Naim(14)
- Guler, Omer(14)
- Gürler, Nedim(14)
- Karatay, Gülnaz(14)
- Utku, Anıl(14)
- Yildirim, N. C.(14)
- Özkul, İskender(14)
- Demirol, Ferhat(13)
- Erguven, Gokhan Onder(13)
- Firat, Erhan(13)
Yayınlar
- MakaleYalnız künye2018Scopus SJRQ1Biochemical responses of Gammarus pulex to malachite green solutions decolorized by Coriolus versicolor as a biosorbent under batch adsorption conditions optimized with response surface methodology
Yildirim, Nuran Cikcikoglu; Tanyol, Mehtap; Yildirim, Numan; Serdar, Osman; Tatar, Sule
The current study was aimed to investigate the detoxifying and antioxidant enzyme response of Gammarus pulex exposed to malachite green (MG) after decolorization by Coriolus versicolor. Response surface methodology (RSM) was utilized to optimize the decolorization conditions of MG synthetic solutions by C. versicolor. Glutathione (GSH), malondialdehyde (MDA) levels and glutathione peroxidase (GPX), catalase (CAT), superoxide dismutase (SOD), glutathione S-transferase (GST), cytochrome P450 1A1 (CYP1A1) activities in G. pulex exposed to undecolorized (A1) and decolorized (A2) MG synthetic solution during 24 and 96 h were tested by using ELISA method. SOD and GPX enzyme activity was increased after decolorization (p > 0.05). CAT enzyme activity was increased in A2 group during 24 h (p > 0.05) but decreased during 96 h (p < 0.05). GSH levels were increased in A2 group during 24 and 96 h (p < 0.05). GST, CYP1A1 enzyme activity and MDA levels were decreased after decolorization during 96 h (p < 0.05). In this study, GSH levels, CAT, GST and CYP1A1 activities in G. pulex approved the capability of C. versicolor in MG decolorization, optimized with RSM.
AtıfScopus28WoS24OpenAlex31
İncele - MakaleYalnız künye2018Scopus SJRQ3An efficient compression of ECG signals using deep convolutional autoencoders
Yildirim, Ozal; Tan, Ru San; Acharya, U. Rajendra
Background and objective: Advances in information technology have facilitated the retrieval and processing of biomedical data. Especially with wearable technologies and mobile platforms, we are able to follow our healthcare data, such as electrocardiograms (ECG), in real time. However, the hardware resources of these technologies are limited. For this reason, the optimal storage and safe transmission of the personal health data is critical. This study proposes a new deep convolutional autoencoder (CAE) model for compressing ECG signals. Methods: In this paper, a deep network structure of 27 layers consisting of encoder and decoder parts is designed. In the encoder section of this model, the signals are reduced to low-dimensional vectors; and in the decoder section, the signals are reconstructed. The deep learning approach provides the representations of the low and high levels of signals in the hidden layers of the model. Hence, the original signal can be reconstructed with minimal loss. Very different from traditional linear transformation methods, a deep compression approach implies that it can learn to use different ECG records automatically. Results: The performance was evaluated on an experimental data set comprising 4800 ECG fragments from 48 unique clinical patients. The compression rate (CR) of the proposed model was 32.25, and the average PRD value was 2.73%. These favourable observation suggest that our deep model can allow secure data transfer in a low-dimensional form to remote medical centers. We present an effective compression approach that can potentially be used in wearable devices, e-health applications, telemetry and Holter systems.
AtıfScopus201OpenAlex206İncele - MakaleYayıncıda açık erişim2018Scopus SJRQ1Doping assessment in GaAs nanowires
Goktas, N Isik; Fiordaliso, E.M.; Lapierre, R.R.
Semiconductor nanowires (NWs) are a candidate technology for future optoelectronic devices. One of the critical issues in NWs is the control of impurity doping for the formation of p-n junctions. In this study, beryllium (p-type dopant) and tellurium (n-type dopant) in self-assisted GaAs NWs was studied. The GaAs NWs were grown on (111) Si by molecular beam epitaxy using the self-assisted method. The dopant incorporation in the self-assisted GaAs NWs was investigated using Raman spectroscopy, photoluminescence, secondary ion mass spectrometry and electron holography. Be-doped NWs showed similar carrier concentration as compared to thin film (TF) standards. However, Te-doped NWs showed at least a one order of magnitude lower carrier concentration as compared to TF standards. Dopant incorporation mechanisms in NWs are discussed.
AtıfScopus42WoS41OpenAlex48İncele - MakaleYalnız künye2018Scopus SJRQ1Boron, carbon, oxygen and radiogenic isotope investigation of carbonatite from the Miaoya complex, central China: Evidences for late-stage REE hydrothermal event and mantle source heterogeneity
Çimen, O.; Kuebler, C.; Monaco, B.; Simonetti, S.S.; Corcoran, L.; Chen, W.; Simonetti, A.
The Miaoya carbonatite complex (MCC) is located within the southern edge of the Qinling orogenic belt in central China, and is associated with significant rare earth element (REE) and Nb mineralization. The MCC consists of syenite and carbonatite that were emplaced within Neo- to Mesoproterozoic-aged supracrustal units. The carbonatite intruded the associated syenite as stocks and dikes, and is mainly composed of medium- to fine-grained calcite and abundant REE-bearing minerals. Carbonatite melt generation and emplacement within the MCC occurred during the Silurian (at ~440 Ma), and was subsequently impacted by a late-stage hydrothermal event (~232 Ma) involving REE-rich fluids/melt. This study reports trace element and stable (B, C, and O) and radiogenic (Nd, Pb, and Sr) isotope data for the MCC carbonatite, and these have been subdivided into three groups that represent different REE contents, interpreted as varying degrees of hydrothermal interaction. Overall, the group of carbonatites with the lowest enrichment in LREEs (i.e., least affected by hydrothermal event) is characterized by δ11B values that vary between −7 (typical asthenospheric mantle) and + 4‰; δ11B values and B abundances (~0.2 to ~1 ppm) do not correlate with LREE contents. The Sm-Nd and Pb-Pb isotope systems have both been perturbed by the late-stage, REE-rich hydrothermal activity and corroborate open-system behavior. Contrarily, initial 87Sr/86Sr ratios (vary between ~0.70355 and 0.70385) do not correlate significantly with both LREEs and Sr abundances, nor with initial 143Nd/144Nd ratios. The late-stage hydrothermal event overprinted the Nd and Pb isotope compositions for most of the carbonatite samples examined here, whereas a majority of the samples preserve their variable B and Sr isotope values inherited from their mantle source. The B and Sr isotope data for carbonatites exhibiting the least LREE enrichment correlate positively and suggest carbonatite melt generation from a heterogenous upper mantle source that records the input of recycled crustal material. This finding is consistent with those previously reported for young (<300 Ma old) carbonatites worldwide.
AtıfScopus42WoS39İncele - MakaleYalnız künye2018Scopus SJRQ3Response surface modeling for Pb(II) removal from alcoholic beverages using natural clay: Process optimization with box–behnken experimental design and determination by electrothermal AAS
Ince, Olcay Kaplan; Ince, Muharrem; Onal, Ali
A three-level four-factor Box–Behnken experimental design (BBD) combined with response surface modeling (RSM) was used for the optimization and modeling of Pb(II) adsorption from alcoholic beverages onto natural clay. The BBD method was chosen as the statistical prediction method to reduce the experimental numbers which saves time and chemicals and reduce analysis cost. Various independent process variables including solution pH (X1: 3.0– 7.0), contact time (X2: 2–60 min), adsorbent dosage (X3: 0.01-0.1 g), and agitation speed (X4: 50–150 rpm) were optimized. The optimal conditions used for Pb(II) removal were pH of 5.3, contact time 38.9 minutes, 0.071 g adsorbent dosage, and 98.7 rpm agitation speed, resulting in a maximum removal efficiency of 120 mg g-1. Pb was determined by electrothermal AAS. The significance of the independent variables and their interactions were tested by means of the analysis of variance (ANOVA) and are based on the ANOVA statistical value. The adsorption of Pb(II) onto clay was found to be highly significant with very low probability (p) values (<0.001). These results were justified by the relatively high correlation coefficients (R2 = 0.9965, R2 adj = 0.9930, and R2 Pred= 0.9819) of the statistical prediction. FTIR analysis confirmed major participation of amide, amines, ketones, including the primary alcohol groups, during Pb(II) biosorption. Clay was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM), coupled with energy dispersive X-Ray (EDX). The proposed adsorption process efficiently removes Pb(II) present in various aqueous media and can be used for industrial wastewater or drinks.
AtıfScopus6İncele - MakaleYalnız künye2018Scopus SJRQ1An interval type-2 fuzzy AHP and TOPSIS methods for decision-making problems in maritime transportation engineering: The case of ship loader
Celik, Erkan; Akyuz, Emre
Duration of cargo operation (loading or discharging) is of paramount importance for ship owners and port managers since idle time at terminal significantly boost to the cost of providing shipping service. Hence, it is important to choose the appropriate shiploader type for handling bulk materials. This paper aims to present a comprehensive multi-criteria decision making (MCDM) method extended by interval type-2 fuzzy sets (IT2FSs) for selecting appropriate shiploader type in maritime transportation. The proposed approach incorporates Analytical Hierarchy Process (AHP) and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) under IT2FSs environment to overcome more of the uncertainty of experts’ judgement and expression in decision-making. The proposed approach adopts a sensitivity analysis to investigate the impact of key performance indicator (KPI) under numerous conditions. Besides its robust theoretical background, this paper prompts practical benefits to decision-makers (port owners or port managers) who make investment decision for appropriate shiploader type in dry bulk cargo shipment.
AtıfScopus165WoS148OpenAlex172İncele - MakaleYalnız künye2018Scopus SJRQ2A novel wavelet sequences based on deep bidirectional LSTM network model for ECG signal classification
Yildirim, Özal
Long-short term memory networks (LSTMs), which have recently emerged in sequential data analysis, are the most widely used type of recurrent neural networks (RNNs) architecture. Progress on the topic of deep learning includes successful adaptations of deep versions of these architectures. In this study, a new model for deep bidirectional LSTM network-based wavelet sequences called DBLSTM-WS was proposed for classifying electrocardiogram (ECG) signals. For this purpose, a new wavelet-based layer is implemented to generate ECG signal sequences. The ECG signals were decomposed into frequency sub-bands at different scales in this layer. These sub-bands are used as sequences for the input of LSTM networks. New network models that include unidirectional (ULSTM) and bidirectional (BLSTM) structures are designed for performance comparisons. Experimental studies have been performed for five different types of heartbeats obtained from the MIT-BIH arrhythmia database. These five types are Normal Sinus Rhythm (NSR), Ventricular Premature Contraction (VPC), Paced Beat (PB), Left Bundle Branch Block (LBBB), and Right Bundle Branch Block (RBBB). The results show that the DBLSTM-WS model gives a high recognition performance of 99.39%. It has been observed that the wavelet-based layer proposed in the study significantly improves the recognition performance of conventional networks. This proposed network structure is an important approach that can be applied to similar signal processing problems.
AtıfScopus807WoS607OpenAlex837İncele - Derleme MakaleYalnız künye2018Scopus SJRQ2A review of occupational health and safety risk assessment approaches based on multi-criteria decision-making methods and their fuzzy versions
Gul, Muhammet
Occupational health and safety (OHS) is a multidisciplinary activity working under the tasks of protection of workers and worksites. Risk assessment, as a compulsory process in implementation of OHS, stands out as evaluating the risks arising from the hazards, taking into account the required control measures, and deciding whether or not the risks can be reduced to an acceptable level. The diversity in risk assessment approaches is such that there are many methods for any industry. Multicriteria decision-making (MCDM)-based approaches contribute to risk assessment knowledge with their ability on solving real-world problems with multiple, conflicting, and incommensurate criteria. This article conducts a critical state-of-the-art review of OHS risk assessment studies using MCDM-based approaches. Additionally, it includes fuzzy versions of MCDM approaches applied to OHS risk assessment. A total of 80 papers are classified in eight different application areas. The papers are reviewed by the points of publication trend, published journal, risk parameters/factors, and tools used. This critical review provides an insight for researchers and practitioners on MCDM-based OHS risk assessment approaches in terms of showing current state and potential areas for attempts to be focused in the future.
AtıfScopus181WoS144OpenAlex189İncele - MakaleYalnız künye2018Scopus SJRQ3Curcumin ameliorates doxorubicin-induced cardiotoxicity by abrogation of inflammation, apoptosis, oxidative DNA damage, and protein oxidation in rats
Benzer, Fulya; Kandemir, Fatih Mehmet; Ozkaraca, Mustafa; Kucukler, Sefa; Caglayan, Cuneyt
Doxorubicin (DXR) is a highly effective drug for chemotherapy. However, cardiotoxicity reduces its clinical utility in humans. The present study aimed to assess the ameliorative effect of curcumin against DXR-induced cardiotoxicity in rats. Rats were subjected to oral treatment of curcumin (100 and 200 mg/kg body weight) for 7 days. Cardiotoxicity was induced by single intraperitoneal injection of DXR (40 mg/kg body weight) on the 5th day and the rats sacrificed on 8th day. Curcumin ameliorated DXR-induced lipid peroxidation, glutathione depletion, decrease in antioxidant (superoxide dismutase, catalase, and glutathione peroxidase) enzyme activities, and cardiac toxicity markers (CK-MB, LDH, and cTn-I). Curcumin also attenuated activities of Caspase-3, cyclooxygenase-2, inducible nitric oxide synthase, and levels of nuclear factor kappa-B, tumor necrosis factor-α, and interleukin-1β, and cardiac tissue damages that were induced by DXR. Moreover, curcumin decreased the expression of 8-OHdG and 3,3′-dityrosine. This study demonstrated that curcumin has a multi-cardioprotective effect due to its antioxidant, anti-inflammatory, and antiapoptotic properties.
AtıfScopus154WoS143OpenAlex163İncele - MakaleYalnız künye2018Scopus SJRQ3Investigation of biochemical response in rainbow trout (Oncorhynchus mykiss, Walbaum, 1792) exposed to remazol brillant blue R textile dye
Yildirim, N.C.; Dogan, L.
The dyes used in textile industry production are toxic substances and most of them have polymer structures. These dyes pollute the aquatic environment via various stages such as printing and dyeing, and may cause molecular, cellular, biochemical and physiological disorders. The aim of the present study was to evaluate effect of a highly toxic azo dye, Remazol Brillant Blue (RBBR) on the biochemical responses of rainbow trout, Oncorhynchus mykiss. The fishes were exposed to 0.5, 1 and 2 mg/l of RBBR for 24 and 48 h. The glutathione S-transferase (GST), cytochrome P-450 (CYP1A1) and lactate dehydrogenase (LDH) enzyme activities of these groups were measured. Present dye altered the activities of all these enzymes in the selected tissue of the experimental fish in a dose-dependent manner. According to the results of this study, after dye exposure, the alteration of selected enzymes indicated deterioration in antioxidant defense system, aerobic respiration processes and biotransformation mechanism induced by the tested dye. It was also shown that GST, CYP1A1 and LDH enzymes may be useful as biomarkers in determining the toxic effects in O. mykiss exposed to the RBBR textile dye.
AtıfScopus2İncele - MakaleYayıncıda açık erişim2018Scopus SJRQ3A FUZZY DEMATEL MODEL PROPOSAL FOR THE CAUSE AND EFFECT OF THE FAULT OCCURRING IN THE AUXILIARY SYSTEMS OF THE SHIPS’ MAIN ENGINE
Balin, A.; Demirel, H.; Celik, E.; Alarcin, F.
The ship engine room has a structure that meets a number of needs related to administrative conditions. Even if a simple mechanical error is considered to be the addition of human errors into the complex structure of the engine room, it can lead to undetected loss. How the causes and effects of the detected faults affect the system is as important as an effective fault detection system to detect the fault and take immediate action against any possible engine failure. This study reveals the causes of problems occurring in the main engine auxiliary systems including cooling, lubricating, cooling oil and fuel systems, and the extent of these problems affecting the system. While the Decision Making Trial and Evaluation Laboratory supports to identify and analyze the error detection of auxiliary systems with respect to causal effect relation diagram, fuzzy sets deal with the uncertainty in decision-making and human judgements through the DEMATEL. Therefore, fuzzy DEMATEL approach is applied to examine the causes and the weights of the faults and their relation to each other in the auxiliary systems. When we look at the result of the proposed approach, fuel oil pump failures has more impact on the all system and air cooler problems has the second highest place among the all errors.
AtıfOpenAlex1İncele - MakaleYalnız künye2018Scopus SJRQ2Effect of the novel biodegradable copolymer and soil salinity on the growth of corn plant
Torğut, Gülben; Beker Akbulut, Gülcin
Biodegradable and biocompatible poly (1,2-epoxy-3-phenoxy propane)-co-(ε-caprolactone) poly(EPP-co-ε-CL) copolymers were synthesized by ring-opening polymerization method at four different ε-CL ratios. Copolymers were characterized using Fourier-transform infrared spectroscopy, proton nuclear magnetic resonance (1H-NMR), thermogravimetric analysis, and differential scanning calorimetry. To examine their possible applications in agriculture, germination test and growth analyses of corn plants were carried out. For this purpose, corn (Zea mays L. cv. “72 May 80”) was allowed to germinate under suitable conditions. Copolymers, 200 mM salt (NaCl) solution, and both copolymers and salt solution were applied to the plants and compared with the control groups. On the 21st day, all the plants were harvested and were stored at −80°C until analysis. Differences in growth parameters, lipid peroxidation degrees, pigment analysis, and total carbohydrate analysis were tested in order to put forward copolymer and NaCl sensitivity of the corn. Statistical analysis was carried out using the SPSS 17.0 software program and the results were compared with each other. These results showed that the copolymers both have a positive effect on the carbohydrate and malondialdehyde (MDA), a product of lipid peroxidation content as well as the chlorophyll content. Moreover, poly(EPP-co-ε-CL0.88) was more efficient than was the other copolymers in the improvement of the detrimental effects of salinity in increasing chlorophyll, carbohydrate, and MDA content, and growth of corn plants. As a result of the study, it was demonstrated that all of the investigated parameters were affected by the applications of salt and copolymers.
AtıfScopus2WoS2OpenAlex3İncele - MakaleYalnız künye2017A stochastic location and allocation model for critical items to response large-scale emergencies: A case of Turkey
Celik, Erkan; Aydin, Nezir; Gumus, Alev Taskin
This paper aims to decide on the number of facilities and their locations, procurement for pre and post-disaster, and allocation to mitigate the effects of large-scale emergencies. A two-stage stochastic mixed integer programming model is proposed that combines facility location-prepositioning, decisions on pre-stocking levels for emergency supplies, and allocation of located distribution centers (DCs) to affected locations and distribution of those supplies to several demand locations after large-scale emergencies with uncertainty in demand. Also,theuseofthemodelisdemonstratedthroughacasestudyfor prepositioning of supplies in probable large-scale emergencies in the eastern and southeastern Anatolian sides of Turkey. The results provide a framework for relief organizations to determine the location and number of DCs in different settings, by using the proposed model considering the main parameters, as; capacity of facilities, probability of being affected for each demand points, severity of events, maximum distance between a demand point and distribution center.
- MakaleYalnız künye2017Women's Powerty in Turkey in terms of Gender Rolles
Tire, Olcay
Toplum, cinsiyetlerinden ötürü kadın ve erkeğe ayrı ayrı muamelelerde bulunur; onlara farklı özellikler, davranışlar, görevler, duygular yükler. Ataerkil toplumsal ilişkiler zemininden yükselen bu ayrım, her toplumda rol farklılaşmalarına ve cinsiyete dayalı eşitsizliklere yol açmıştır ve de açmaktadır. Bu rol farklılaşmaları, toplumda kadınların değersiz görülen ev ve bakım işlerinden (çocuk-yaşlı-hasta bakımı) sorumlu tutulmalarına, dolayısıyla kadınların toplumda pasif bir konumda olmalarına neden olmaktadır. Buna karşın erkeklerse çok daha etkin pozisyonları ellerinde tutmaktadırlar. Kadınlara biçilen bu geleneksel roller, bir yandan onların toplumsal hiyerarşideki derecesini alçaltırken diğer yandan erkelere göre daha kolay ve derinden yoksullaşmalarına neden olmaktadır. Bu çalışmanın amacı da kadın cinsi üzerinden toplumsal cinsiyet ve yoksulluğun neden sonuç ilişkilerini açıklayıp kadının ücretsiz olarak gerçekleştirdiği bakım emeğindeki sömürüyü ortaya koymaktır.
AtıfTR Dizin2
İncele - MakaleYalnız künye2017Milli Mücadele Yıllarında İmalat-ı Harbiye Fabrikaları
Zengin, Ersoy
İmalat-ı Harbiye Fabrikaları, Birinci Dünya Savaşı boyunca binlerce işçisiyle Osmanlı ordularının silah ve mühimmat ihtiyaçlarını karşılamıştır. Bu fabrikalar İstanbul'da; Zeytinburnu, Tophane, Kırkağaç ve Bakırköy'de faaliyet göstermekteydi. Ayrıca taşrada Hendek ve Bayramiç'te kereste, Konya ve Kayseri'de güherçile ihtiyacı için fabrikalar bulunmaktaydı. İmalat-ı Harbiye Fabrikaları, Mondros Mütarekesi'nin imzalanmasıyla silah üretim faaliyetlerini durdurdu. Fabrikaların bir kısmında sivil ihtiyaçlara yönelik üretim yapılmaya başlandı. İşgalci güçlere karşı Anadolu'da silahlı direniş başlayınca İstanbul'da bulunan İmalat-ı Harbiye mensuplarının birçoğu Anadolu'ya geçerek Kurtuluş Savaşı'na katıldılar. Bu işçiler küçük tamirhaneler kurarak orduya büyük fayda sağladılar. Bu makalede, silah üretim faaliyetlerine son verilerek ticari üretime başlayan İstanbul'daki İmalat-ı Harbiye Fabrikalarının faaliyetleriyle Anadolu'ya geçerek Milli Mücadele'ye katılmış olan İmalat-ı Harbiye işçilerinin silah ve mühimmat üretimi için yaptıkları çalışmalar incelenmiştir.
AtıfTR Dizin3İncele - MakaleYalnız künye2017Alabalık çiftliği sularında tetrasiklin ve parçalanma ürünlerinin araştırılması ve izlenmesi
Topal, Murat
In this study, tetracycline and degradation products were determined in the basins of a trout farm and in the stream carrying the waters of trout farm. 4-epianhydrotetracycline (EATC) and anhydrotetracycline (ATC) concentrations were determined under the detection limit in upstream of trout farm. The highest and lowest tetracycline concentrations detected in trout farm are 7.64±0.38 ppb and under detection limit, respectively. The highest and lowest 4-epitetracycline concentrations were 16.2±0.8 and 1.85±0.09 ppb, respectively while the highest and lowest 4-epianhydrotetracycline concentrations detected in trout farm were 25.8±1.3 and 6.12±0.30 ppb, respectively. The highest and lowest anhydrotetracycline concentrations detected in trout farm were 18.5±0.9 and 6.24±0.31 ppb, respectively. Mean tetracycline, 4-epitetracycline, 4-epianhydrotetracycline and anhydrotetracycline concentrations were 3.52±0.17; 5.30±0.26; 14.4±0.7 and 9.64±0.48 ppb in downstream of trout farm. When upstream and downstream were compared in terms of tetracycline and degradation products it could be said that Keban stream was affected as a result of activity of trout farm
AtıfTR Dizin1İncele - MakaleYalnız künye2017The bryophyte flora of Baskil district (Elazığ/Turkey)
Alataş, Mevlüt; Batan, Nevzat
In this study, the bryophyte flora of the Baskil District (Elazığ) was investigated between April and October 2015. In total 54 taxa (1 liverwort, 53 mosses), belonging to 13 families and 29 genera were determined by identifying bryophyte specimens collecting the study area. From these taxa, twenty four taxa are new records for Elazığ province, according to the grid-square system of Henderson (1961) fifteen taxa are new records for B9 grid square. Pellia epiphylla has been reported for the first time in Elazığ province with the present paper. While the largest families in terms of number of taxa are Pottiaceae (14), Brachytheciaceae (9), Bryaceae and Grimmiaceae (8), the largest genera are Syntrichia (6), Grimmia (6) and Ptychostomum (4). In addition, the life forms of the taxa which were examined in terms of ecological and floristic have been analyzed. From life forms; while Turf life form ranks the first, Cu life form ranks the second. Most of the taxa within the floristic list in terms of some ecological characteristics are xerophyt, photophyt and subneutrophyt
AtıfTR Dizin7İncele - MakaleYalnız künye2017Present Status of Viticulture in Mardin, Nusaybin Province, its Problems and Possible Solutions
Sanyürek, Nesrin Karaca; Çakır, Atilla; Ay, Şilan; Karakaya, Ersin
This study was conducted in 100 vineyard enterprises representing Mardin Nusaybin district. Data are obtained by questionnaire from 100 producers. In the light of the data gathered in the study it was aimed to determine of the educational status, age, bond business conditions and the size of the organization. According to the results of the questionnaire, it was determined that the level of education for producers dealing with vineculture in that district was low (69.0 % primary school). The average age of the surveyed manufacturers 54.2 and 37 % of the vineyard area 's are found to be under 20 da. Viticulture is done as a family business in the region. All of the surveyed manufacturers vineyards "other" (except for the cordon, guyot and pergola) training system that uses rate of 58.0 % and finishing system "is recommended because it stated that they preferred. Producers are determined who are not members of the cooperatives or the union. As a result; it is necessary to take a series of measures issues such as old ties, making viticulture in arid conditions and the growing viticulture techniques known enough in the province of Nusaybin in Mardin.
AtıfTR Dizin6İncele - MakaleYalnız künye2017İzole Bir AA Mikroşebekede Lig Şampiyonası Algoritması İle Optimum Otomatik Üretim Kontrolü
Cebeci, Mehmet; Gülan, Harun; Gençoğlu, Muhsin Tunay; Özdermir, Mahmut Temel; Yildirim, Burak
Modern güç sistemlerinde, ciddi bozulmaları takiben üretim-yük dengesinin koruma yeteneğini artırmak için optimum kazançlara sahip bir kontrolöre ihtiyaç vardır. Mikro şebeke sayısının artması nedeniyle bu sorun bugün daha belirgin bir hale gelmiştir. Mikro şebekeler çoğunlukla elektrik gücü üretiminde yenilenebilir enerji kaynaklarını kullandığı için üretim miktarları doğal olarak sürekli değişmektedir. Bu çalışmada AA mikro şebeke sistemlerinde frekans kontrolü için PID kontrolör kullanılmıştır. Kontrolörlerin kazançlarının optimal değerlerinin belirlenmesinde yeni bir sezgisel yöntem olan LŞA önerilmiştir. ITSE maliyet fonksiyonuna göre LŞA, PSO ve ABC ile kontrolör kazançları belirlenmiştir. Bu üç yönteme göre elde edilen kazanç değerleri kullanılarak sistemin zaman domainindeki simülasyonları yapılmış ve performansları karşılaştırılmıştır.
AtıfTR Dizin2İncele - MakaleYalnız künye2017Mekanik Alaşımlama Yöntemi İle Üretilen Co Alternatifi FeCuNiSnPMoMn Alaşımının Sıcak Presleme Karakteristiklerinin İncelenmesi
Celik, Ertugrul
Elmaslı kesici takımlar, günümüzde sıklıkla doğal taşların işlenmesinde kullanılan kesici takımlardır. Bu malzemeler toz metalurjisi teknikleri kullanılarak imal edilen, sentetik elmas ve metal bir matristen meydana gelen kompozit malzemelerdir. Co zararlı etkilerinden ve yüksek fiyatından dolayı imalatçılar tarafından tercih edilmemektedir. Bu nedenle Co alternatifi olan az yada kobalt içermeyen tozlar geliştirilmektedir. Yapılan bu çalışmada Fe esaslı mekanik alaşımlanmış toz sırası ile 700, 750, 800, 850 ve 900 oC'de 35 MPa basınç altında sıcak preslenmiştir. Üretilen numunelerin fiziksel özelliği olarak yoğunluk değerleri, metalurjik özelliklerini incelemek içim mikroyapı incelemeleri ve mekanik özelliklerini belirlemek için 3 nokta eğme dayanımları araştırılmıştır. Elde edilen deneysel veriler sonucunda, sıcak presleme sıcaklığı arttıkça numunelerdeki porozite oranının %10,69'dan %2,01'e kadar azaldığı ve 3 noktalı eğilme dayanımının 480 MPa'dan 1446 MPa değerine kadar arttığı görülmüştür. Elde edilen sonuçlar neticesinde Fe esaslı matrisin elmaslı kesici takım endüstrisinde Co alternatifi olarak kullanılabileceği sonucuna varılmıştır.