Sürdürülebilir Kalkınma Amaçları

Yazarlar

  • DüzeltmeYalnız künye2021
    INNOVATIVE FLOW RISK ASSESSMENT WITH CLIMATE CHANGE PERSPECTIVE IN YESILIRMAK BASIN (vol 29, pg 514, 2020)

    Serencami, Ugur; Dabanli, Ismail

  • MakaleAçık Erişim2021Scopus SJRQ3
    Androsace azizsancarii sp. nov. (Primulaceae): a new species from northeastern Anatolia, Turkey

    Sefali, Abdurrahman

    Androsace azizsancarii (Primulaceae) is described and illustrated as a new species from Bayburt Province in northeastern Anatolia, Turkey. Diagnostic morphological characteristics, a full description and a distribution map are provided. The new species is morphologically closest to Androsace albana, A. multiscapa and A. villosa, but it is easily distinguished from these species by indumentum, leaf, flower and seed characters.

    AtıfWoS6OpenAlex3
    Web of Scienceİncele
  • MakaleAçık Erişim2021
    Comparison of oxygen consumption of football players in different positions of the game

    Ceylan, Ramazan

    Background: Football players have different structural and physiological characteristics due to the variety of tasks that lie in this field. The main purpose of this research was to compare oxygen consumption of football players in different positions of the game. Materials and methods: The research method was causal or post-occurrence. So nine halfbacks, seven attackers, three goalkeepers and six defenders were chosen to participate in this research. The Chinese bicycle was used to measure V-O2max. The heart rate was determined by the electronic heart rate. Nolan Margaria-Kalamen test machine was used to measure the anaerobic power of players. Analysis of variance and F test were used to compare the mean of differences. All steps were performed using SPSS 21 at the level of 0.05. Results: There is a significant difference between V-O2max of goalkeepers and halfbacks; between goalkeepers and attacking players; between defenders and attackers. There was a significant difference between the anaerobic capacity of halfbacks and goalkeepers; between attackers and goalkeepers. Conclusion: The position and the duration of activity has a great effect on V-O2ma(x) and anaerobic of players. So to increase both characteristics of the players depends on the position of the game.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfOpenAlex1
    Web of Scienceİncele
  • Derleme MakaleAçık Erişim2021
    The Effects of Instructional Interventions on the Academic Achievement of Students with Mathematical Learning Difficulties

    Filiz, Tunahan

    Introduction: The aim of this study is to make an up-to-date and detailed analysis by synthesizing different types of primary studies that examine the effect of instructional interventions for students with mathematical learning difficulties on academic achievement. Method: Different types of studies that examine the effects of instructional interventions for students with mathematics learning difficulties on academic achievement were analyzed using meta-analysis method. The effect size values of the studies, the test of heterogeneity, publication bias and information about the moderator analysis were calculated using the CMA (Comprehensive Meta Analysis) statistical program. Findings: The study revealed that intervention programs prepared for students with mathematical learning difficulties had a wide effect on the academic achievement levels of students (Hedge g = 0.764, %95 CI = 0.494-1.033). Discussion: The overall effect size (0.764) obtained from the studies shows that instructional interventions have a positive effect on the mathematics performance of students with learning difficulties. It is seen that different instructional interventions have been developed in order to support these students. The instructional interventions support students in the process of learning mathematics, and continue to raise awareness on the learning difficulties. As a result, it can be stated that more instructional intervention studies are needed.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    • SDG 4 · Nitelikli Eğitim
    • SDG 10 · Eşitsizliklerin Azaltılması
    AtıfWoS3OpenAlex9TR Dizin7
    Web of ScienceTR Dizinİncele
  • MakaleYalnız künye2021
    Apitherapy and Muscle Damage

    Ceylan, Ramazan; Erdogan, Yasar

    Aim: This study aims to compare the effects of dolgit cream, an anti-inflammatory drug in the NSAID group, is frequently used in treating injuries after sports activities, and natural honey, used due to its anti-inflammatory effect, on muscle damage. Methods: Twenty-one amateur male athletes voluntarily participated in this study (Age: 21 +/- 3). The participants were divided into three groups as honey treatment group (n=7), drug treatment group (n=7), and control group (n=7). In the gym, one-session of intense interval training consisting of movements (unusual push-ups, diamond push-ups, dips) in which the athletes participating in the study were not used was applied. Blood samples were taken consecutively for five days, one time before and four times after the training program. Blood samples were analyzed biochemically, and activation of Creatine Kinase (CK), Lactate Dehydrogenase (LDH) enzymes were determined. Besides, the participants' pain levels (Visual Analogue Scale) were monitored for four days after the training. SPSS 22.0 package program was used for data analysis. The suitability of the data for normal distribution was analyzed with the Shapiro-Wilk test, and it was determined that the data were not distributed normally. Kruskal-Wallis test was applied to determine the acute effect of the treatment protocols carried out in the treatment of muscle damage after the training Results: According to the result, no statistically significant difference was found between the treatment groups and the control group in the activation of CK, LDH in the blood serum (p>.05). According to the pain scale follow-up results, it was observed that the pain scores of the participants in the group who received honey treatment were lower and statistically significant in the 1st after the training (p<.05) Conclusion: As a result, the external application of natural honey in sports injuries may support modern medical treatment practices

  • MakaleAçık Erişim2021
    A MATRIX PRESENTATION OF HIGHER ORDER DERIVATIVES OF BEZIER CURVE AND SURFACE

    Aydin, Tuba Agirman

    In this study, the Bezier curves and surfaces, which have an important place in interactive design applications, are expressed in matrix form using a special matrix that gives the coefficients of the Bernstein base polynomial. The matrix forms of higher order derivatives of the Bezier curves and surfaces are obtained. It is demonstrated by numerical examples that the bidirectional transition between the control points and parametric equations of the Bezier curves and surfaces can be easily achieved using these matrix forms. In addition, it is demonstrated that this type of curve and surface, whose control points are known, its higher order derivatives can be calculated without it's parametric equations. In this study, the Bezier curves and surfaces are presented in a more easily understandable and easy to use format in algebraic form for designers.

    AtıfOpenAlex3
    Web of Scienceİncele
  • MakaleAçık Erişim2021
    Clustering framework to cope with COVID-19 for cities in Turkey

    Guleryuz, Didem; Ozden, Erdemalp

    Introduction: This article is the product of the research Clustering Framework to Cope with COVID-19 for Cities in Turkey, developed at Bayburt University in 2021. Problem: Turkey's risk map, presented in January 2021, to take local decisions in tackling the COVID-19 pandemic, was based on confirmed cases only. Health, socio-economic and environmental indicators are also important for management decisions of COVID-19. The risk map to be designed by adding these indicators will support more effective decisions. Objective: The research aims to propose a clustering scheme to design a risk map of cities for Turkey. Methodology: The unsupervised clustering algorithm suggested dividing the cities of Turkey into clusters, considering health, socio-economic, environmental indicators, and the spread pattern of COVID-19. Results: We found that cities are clustered into five groups while megacity Istanbul alone formed a cluster, three of Turkey's largest cities formed another cluster. Other clusters consist of 19, 26, and 32 cities, respectively. The most important determinants which have predictive power are identified. Conclusion: The suggested clustering method can be a decision support system for policymakers to determine the differences and similarities of cities in quarantine decisions and normalization phases for the following periods of the pandemic. Originality: To the best of our knowledge, this study differs from previous studies because countries were grouped in previous studies by only considering the confirmed cases. In this study, cities were clustered in terms of the health, socio-economic, and environmental indicators to make decisions locally. Limitations: The distribution of confirmed cases by age could be added, especially to make decisions about education, but this data is not officially announced.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 11 · Sürdürülebilir Şehirler ve Topluluklar
    AtıfWoS1OpenAlex1
    Web of Scienceİncele
  • MakaleAçık Erişim2021
    Effect of tarragon addition on volatile compound profile and some quality paramaters of sucuk

    Kamiloglu, Aybike; Elbir, Tugba; Topçu, Kubra Cinar

    The goal of the present study was to investigate the effect of tarragon and ripening period on certain quality parameters and the volatile profile of sucuk (Turkish dry fermented sausage). Tarragon was used in sucuk samples at three distinct levels (0.25%, 0.50% and 0.75%), and tarragon-free samples were used as control. Analyses were performed on the 0., 3., 5., 7., 9. and 13. days of ripening time. Although the presence of tarragon did not affect L* and b* values, the pH, a* (P<0.01), aw (P<0.05), and TBARS values of the sucuk samples were statistically affected. Tarragon demonstrated antioxidant activity in sucuk in accordance with 90 % +/- 0.3 DPPH scavenging activity. When the volatile profile was evaluated, the key component affected by the addition of tarragon was determined as Anisole, p-allyl-. As a result, while an antioxidative effect was detected during ripening in the presence of tarragon in sausage, undesirable changes were not observed on some quality characteristics such as pH and a(w).

    • SDG 2 · Açlığa Son
  • MakaleAçık Erişim2021
    Views on the Usage of Social Media Tools in School-Family Communication

    Kaban, Abdullatif

    This study, it was aimed to reveal the views of parents and teachers about the usage of social media tools in school-family communication. In this study, which was carried out with the phenomenological method, which is one of the qualitative research methods, the data were collected using a semi-structured interview form. As a result of the content analysis conducted on the data obtained, it was concluded that social media tools, especially WhatsApp, are widely used in school-family communication. It has been found that the advantages of these tools are free, fast, and easy to use, and they prevent waste of time and workload by sending mass messages. The disadvantages were determined to be used out of purpose and timeless, causing misunderstanding and violation of privacy. Participants suggested that while using these tools, they should not deviate from their purpose, some restrictions in terms of time and content should be introduced and their use should be expanded. The results obtained are expected to contribute significantly to the studies to be done to increase family participation in education and the practices to be developed in this sense.

    • SDG 4 · Nitelikli Eğitim
    AtıfWoS11OpenAlex15
    Web of Scienceİncele
  • MakaleYalnız künye2021
    Factors influencing e-books' continuance intention in the mobile environment

    Bölen, Mehmet Cem; Yildirim, Serkan; Yildirim, Gurkan

    The identification of factors that affect people's continuous use of e-books on their mobile devices is critical for e-book publishers, e-reader manufacturers and academic researchers. This study proposes a research model that extends the expectation-confirmation model by incorporating perceived enjoyment and facilitating conditions to get a deeper understanding of continuance intention to use e-books in the mobile environment. The structural equation model (SEM) was used to analyse data which were collected from 1,663 e-book readers by an online survey. The results indicate that satisfaction, perceived enjoyment, perceived usefulness and facilitating conditions influence continuance intention significantly. Furthermore, users' confirmation of expectations has a positive effect on perceived usefulness, perceived enjoyment and satisfaction. Surprisingly, perceived usefulness does not have a significant effect on satisfaction. Based on these findings, the theoretical and practical implications, limitations, and recommendations for future research are also discussed.

    AtıfWoS2
    Web of Scienceİncele
  • MakaleYalnız künye2021
    MORPHOMETRIC ANALYSIS TO INFER HYDROLOGICAL BEHAVIOUR OF CORUH RIVER BASIN (NORTHERN TURKEY) USING GIS TECHNIQUE

    Yildirim, Umit

    Morphometric analysis is a very practical approach for evaluating hydrological processes for watersheds. The combination of morphometric, geological, and geomorphological characteristics of the river basin helps to gain further insights in forecasting hydrological phenomena (such as flooding, soil erosion, and groundwater potential). In this study, the morphometric analysis of the Coruh River Basin was conducted using GIS to establish effective water management. Firstly, the basic morphometric parameters (basin area, basin length, basin perimeter, stream order, stream number, and total stream length) were calculated for both CRB and its subbasins. Then, characteristic morphometric parameters (drainage density, drainage texture, form factor, length of the overland flow, topographic wetness index, and stream power index) were determined. Results showed that the infiltration capacity of the subsurface material was low, and the surface runoff was slow in the subbasins located close to the CRB's outlet. Therefore, these subbasins are more sensitive to flooding, erosion, and landslides compared to others. Soil erosion and thus sediment loss is higher in 1st, 2nd, 3rd, and 5th subbasins, and the groundwater potential is higher in headwater areas of the basin. This study revealed that the GIS-based morphometric analysis is beneficial to implement water management tool at the watershed scale.

    AtıfWoS1
    Web of Scienceİncele
  • MakaleYalnız künye2021Scopus SJRQ2
    An online software to simulate the shielding properties of materials for neutrons and photons: NGCal

    Gökçe, H. S.; Güngör, O.; Yilmaz, H.

    NGCal, a free online computation software (http://ngcal.com), has been developed for narrow beam transmission properties of photons (for energies of X rays and gamma rays between 0.002 MeV and 20 MeV), thermal (25.4 meV) and fast neutrons (4 MeV), in this regard it theoretically calculates the mass and linear attenuation coefficient/factor, mean free path, half- and tenth-value layers of materials formed by elements, compounds and composites. Its calculation assumptions, user guide as well as a comparative example of its results to those of other online computation platforms (XCOM, NCNR, WinXCOM, MCNPX, and Phy-X/PSD) are presented in this study. The developed software allows for more data input consisting of elements/oxides/compound and their fractions, and presents a number of shielding results required by researchers and scientists working on radiation shielding properties of multi-component materials.

    AtıfWoS85OpenAlex93
    Web of Scienceİncele
  • MakaleAçık Erişim2021
    Cittaslow: Umbrella branding for Turkish cities

    Sengün, Hayriye; Kara, Adnan

    Cittaslow is an international movement against one of the biggest problems of today, i.e. the effects of dense human population and fast urban life.The study aims to clarify the city branding practices of local governments participating in Cittaslow, and to examine the economic, social and environmental impacts that the movement exerts on cities. In conceptual framework, the Cittaslow movement is explained with its basic philosophy and policies, and city branding is discussed within the image and positioning concepts. The research includes quantitative evaluation of simple statistical data such as mean and standard deviation. The study covers cities in the Turkish Cittaslow network and applies an online questionnaire with the municipality officials. Items related to the importance and social, economic, environmental aspects of Cittaslow are included in the online survey.The research results prove that the economic and social aspects of the Cittaslow movement are more positive for the cities, whereas the environmental aspects are less positive. The Cittaslow movement strengthens the brand image of small towns with associations of territories' cultures and traditions. The authors find that, while preserving local values, urban regeneration can be made with positive city image.

    • SDG 11 · Sürdürülebilir Şehirler ve Topluluklar
    AtıfWoS1OpenAlex3
    Web of Scienceİncele
  • MakaleYalnız künye2021Scopus SJRQ4
    Effects of Bifidobacterium animalis and inulin addition on quality characteristics of synbiotic milk chocolate

    Akgül, Ayse; Sert, Durmus; Mercan, Emin

    The aim of this study was to investigate effects of addition of B. animalis BB-12 (before tempering, BT or after tempering, AT) and inulin (6, 8, and 10%) on thermal, physicochemical characteristics, fatty acid composition, textural properties and probiotic viability of milk chocolates during 60 days of storage. The free fatty acid (FFA) value of milk chocolates ranged from 0.66 to 0.89 (% oleic acid), in which higher ratio of inulin addition increased the FFA. Probiotics and inulin addition increased darkness of chocolates when compared to control. D[4,3] value of samples ranged from 9.26-17.97 mu m. Higher inulin ratio in chocolates increased viscosity and yield value. These values in the group BT were higher than those of the group AT. BB-12 count of probiotic and synbiotic samples ranged from 7.09-8.06 log cfu/g during the storage. Higher inulin ratio increased the probiotics count in samples. Probiotic addition after tempering increased the count of probiotic and improved viability at the end of storage. The results showed that B. animalis BB-12 is capable of surviving in milk chocolate, at an appropriate bacteria count (>107 cfu/g), up to 60 days of storage at 18 degrees C.

    AtıfWoS2
    Web of Scienceİncele
  • MakaleYalnız künye2021
    Effect of testicular morphology on embryo development to the blastocyst stage after round spermatid injection

    Ozmerdiven, Gokhun; Guler, Yavuz; Sahin, Eren; Tatar, Zeynep; Erbin, Akif; Dirican, Ebubekir; Haliloglu, Ahmet Hakan

    If spermatozoa cannot be found after testiculer sperm extraction (TESE) in patients followed up due to nonobstructive azospermia (NOA) and the patients do not want donor spermatozoa, performance of round spermatid injection (ROSI) with the current technology seems to be the last resort. This retrospective study was conducted to evaluate the effect of testicular morphology on the development of embryos to the blastocyst stage obtained from ROSI. Between September 2019 and March 2020, after TESE and biopsy 29 patients who had only spermatid were taken to study. Tubular appearance, basal membrane appearance, Johnson score, peritubular fibrosis, interstitial fibrosis, and Leydig cell proliferation were pathologically examined. Following egg collection, ROSI was applied to the oocytes using the piezoelectric method. The embryos were monitored until the blastocyst stage. The mean age of the 29 patients was 36.3+5.01 years. Also, 7 patients had not previously undergone TESE, 20 had previously undergone once, and 2 had previously undergone twice. It was observed that having a history of TESE and a high Johnson score increased the likelihood of the embryo remaining in the blastocyst stage (P=0.021 and 0.014, respectively). However, other parameters do not affect the likelihood of blastocyst formation (P>0.05). Low TESE history and high Johnson score were associated with embryo development to the blastocyst stage. If spermatozoa are not found in patients with nonobstructive azoospermia, ROSI performed during initial TESE increases the likelihood of blastocyst formation.

    AtıfWoS1
    Web of Scienceİncele
  • MakaleYalnız künye2021
    BIOCHEMICAL AND BIOACTIVE CONTENT IN FRUITS OF WALNUT (JUGLANS REGIA L.) GENOTYPES FROM TURKEY

    Erdogan, Ummugulsum; Argin, Sanem; Turan, Metin; Cakmakci, Ramazan; Olgun, Murat

    Walnuts (Juglans regia L.) are a good source of dietary minerals and contain significant amounts of potassium, phosphorus, magnesium and iron. In Turkey, walnut orchards are found in the coruh Valley and are generally composed of local varieties. Since chemical and physical properties of walnuts are very important in determining their quality, in this study, nut and kernel characteristics, fatty acid composition and phenolic composition were determined for 26 walnut genotypes collected from the valley. Total fat content was found to be between 53.75% and 71.43%, while the crude protein amount ranged from 10.21% to 20.71%. Total carbohydrates were calculated between 14.31-27.52% and ash content was found to be between 1.64% and 3.32%. The oleic acid content and linoleic acid content ranged from 18.34 to 25.58% and 37.09% to 87.51%, respectively. The linolenic acid content was determined between 5.52% and 11.03%. Our study showed that, differences in phenolic component, crude protein and fatty acid content of walnuts were caused by different growing conditions. Genotypes have a rich and stable structure in terms of fruit quality parameters, minerals, organic acids, phenolic composition, antioxidant and fatty acids amounts and amino acids. In other words, these characteristics did not show much variation in genotypes grown in the Valley. However, there was a great variation in hormone levels among genotypes. In terms of the parameters examined, GN2, GNI, ((NIS, GN24, GN25 and GN26 genotypes were determined as rich and stable genotypes.

    AtıfWoS8
    Web of Scienceİncele
  • MakaleAçık Erişim2021Scopus SJRQ1
    Measurement of Propagation Characteristics of Nonreciprocal Networks/Lines Using a Line-Line Method

    Hasar, Ugur C.; Kaya, Yunus; Ertugrul, Mehmet

    In this article have proposed a new calibration-free line-line method for propagation constant (gamma) determination of homogeneous nonreciprocal networks or lines with symmetric reflection property. To achieve our goal, wave-cascading matrices for impedance, amplitude, and phase changes for a line step from a homogeneous reciprocal network or line to a homogeneous nonreciprocal network or line (and vice versa). Two different approaches based on the proposed line-line method are proposed for unique extraction of gamma in forward and backward directions. Measurements of gamma for two reciprocal lines (waveguide straights at X-band and Ku-band with different lengths) and a nonreciprocal line (microwave phase shifter) were first carried out and then compared with measured gamma of these lines by different methods to validate our method and monitor its accuracy.

    AtıfWoS4OpenAlex5
    Web of Scienceİncele
  • MakaleYalnız künye2021Scopus SJRQ1
    Enhancing Burnability Characteristics of Low-Temperature Burnt-Cement Clinker by Recycling Phosphogypsum Wastes

    Aksan, U.; Köseoglu, K.; Gökçe, H. S.

    In the present study, the effect of phosphogypsum, a byproduct from the phosphoric acid production industry, on the clinkerization process was researched in order to improve the burnability of clinkers at lower burning temperatures. Raw meal samples containing phosphogypsum at 0%, 1%, 3%, and 5% by weight were burned at 1,350 degrees C, 1,400 degrees C, 1,450 degrees C, and 1,500 degrees C. The introduction of phosphogypsum reduced the presence of unbounded (free) CaO relatively up to 43%. Thus, the mineralization effect of phosphogypsum promotes lower burning temperatures. The free CaO content of the 5% phosphogypsum containing clinker decreased to 0.94% at 1,400 degrees C after 120 min of burning time. The free CaO content was found to be almost identical (0.75%) to that of industrial clinker burned in a rotary kiln at 1,500 degrees C. Due to the low free CaO content (<1%) and the burnability index (73), the recycling of phosphogypsum wastes was found to be suitable for the production of eco-efficient clinkers. The reduced energy consumption and energy-related CO2 emissions in such modified clinkers can contribute to the economic and ecological goals of the cement industry. (C) 2021 American Society of Civil Engineers.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 12 · Sorumlu Üretim ve Tüketim
    • SDG 13 · İklim Eylemi
    AtıfWoS2OpenAlex3
    Web of Scienceİncele
  • MakaleYalnız künye2021Scopus SJRQ3
    Biocatalytic asymmetric synthesis of (R)-1-tetralol using Lactobacillus paracasei BD101

    Kalay, Erbay; Şahin, Engin

    Asymmetric bioreduction of ketones is a fundamental process in the production of organic molecules. Compounds containing tetralone rings are found in the structure of many biologically active and pharmaceutical molecules. Biocatalytic reduction of ketones is one of the most promising and significant routes to prepare optically active alcohols. In this study, the reductive capacity of Lactobacillus paracasei BD101 was investigated as whole-cell biocatalyst in the enantioselective reduction of 1-tetralone (1). In biocatalytic reduction reactions, the conversion of the substrate and the enantiomeric excess (ee) of the product are significantly affected by optimization parameters such as temperature, agitation rate, pH, and incubation time. Effects of these parameters on ee and conversion were investigated comprehensively. (R)-1-tetralol ((R)-2), which can be used to treat disorder such as obsessive compulsive, post-traumatic stress, premenstrual dysphoric, and social anxiety, was manufactured in enantiopure form, high yield and gram-scale, using whole-cell biocatalysts of L. paracasei BD101. The 7.04 g of (R)-2 was obtained in optically pure form with 95% yield. Also, to our knowledge, this is the first report on production of (R)-2 using whole-cell biocatalyst in excellent yield, conversion, enantiopure form and gram scale. This is a clean, eco-friendly and cheap method for the synthesis of (R)-2 compared with chemical catalyst.

    AtıfScopus23WoS23OpenAlex24
    ScopusWeb of SciencePubMedİncele
  • MakaleAçık Erişim2021Scopus SJRQ3
    Honey: Determination of volatile compounds, antioxidant and antibacterial activities

    Karlidag, Semiramis; Keskin, Merve; Bayram, Sinan; Mayda, Nazlı; Ozkok, Aslı

    Honey is an important functional food for human health and nutrition that is collected by honey bees and stored in the honeycombs. In this study, total phenolic content, antioxidant activity and volatile compounds of 13 different honey samples collected from various districts of Malatya province were investigated. As a result of this study, it was determined that the total phenolic content varied between 8.50 mg GAE 100 g–1 and 73.90 mg GAE 100 g–1 and it was observed that the honey samples were rich in aldehydes, aliphatic acid and esters, alcohols, hydrocarbons, carboxylic acid esters, ketones, terpenes, fatty acids and esters. In addition, the antibacterial effects of honey samples were determined against 18 different pathogenic bacteria using agar well diffusion (AWD) method, minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). In AWD assay, it was recorded that inhibition zone diameters varied between 9 mm and 14 mm and honey samples were found to have a partial inhibitory effect against selected target pathogens.

    • SDG 2 · Açlığa Son
    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfScopus5WoS3OpenAlex7
    ScopusWeb of Scienceİncele