30935 research outputs found
Sort by
SS-ESC: a spectral subtraction denoising based deep network model on environmental sound classification
No full textEnvironmental Sound Classification (ESC), also referred as Sound Event Classification, is an essential part of many speech processing applications in terms of of separating background audio from original signal. By the recent developments in deep learning area, studies related to the ESC area have also been improved significiantly by the researchers. Because the nature of digital sound signals, the ESC was mostly developed using manually extracted one dimensional (1D) so far. In this paper, a novel ESC pipeline which uses spectral subtraction denoising as a preliminary stage was proposed based on deep learning architectures. The well-known deep learning architectures which are GoogLeNet, AlexNet, ShuffleNet, SqueezeNet and ResNet-18 were run over ESC problem by using ESC-10 benchmark dataset. Log-mel spectrogram images were preferred as feature matrices for mentioned networks. The results showed that the proposed SS-ESC model achieved the best results and outperformed many state-of-the-art methods with a test accuracy of 99.17% for the ESC-10 by the help of the AlexNet. These findings significiantly proved that the spectral subtraction denoising can contribute to the environmental sound classification problem in leveraging classification accuracy when it is used as a preliminary stage
Evaluation of metaverse-based digital transformation strategies via an interval-valued q-rung orthopair fuzzy methodology
No full textThe Metaverse is expected to trigger substantial changes to the tourism industry. For example, hotels may change the guest booking experience by implementing this revolutionary technology, which allows customers to take virtual tours of hotel rooms before booking them. In this regard, the study aims to solve the problem of determining the best digital transformation strategy by examining different characteristics of metaverse applications in Turkish corporate travel and hotel companies. The interval-valued q-rung orthopair fuzzy methodology was used to solve the problem in the study. The study's findings include important implications for the literature, businesses, and the tourism industry about metaverse and real-world problems. Furthermore, the implementation scenarios and directions of digital transformation strategies for the metaverse are discussed. Businesses can use the study's proposed model to develop new business models based on metaverse advancements. According to the findings, the virtual tour route for the Metaverse application is the most important criterion. As a result, practitioners in the tourism sector must understand the significance of the virtual tour route in achieving successful digital transformation outcomes. The study's findings reveal that developing a high-level business model rather than traditional business models is the ideal strategy for digital transformation in the tourism industry. It also provides an overview of digital transformation strategy achievements in different areas of the travel and hotel businesses by evaluating the current status of metaverse applications and reporting on the potential problems in building and maintaining these applications. The study is a pioneer in giving a comprehensive perspective on metaverse application solutions, development, management, and digital transformation strategies in corporate hotel and travel businesses
A multidimensional study for design of phytochemical profiling, antioxidant potential, and enzyme inhibition effects of ıs,gın (Rheum telianum) as an edible plant
No full textThe present study reveals in vitro antioxidant properties and the phytochemical content of a novel Rheum species (Rheum telianum), which grows in Southeastern Anatolia. To perform the analysis, dried leaves and seeds of the plants were ground and extracted with ethanol to obtain plant secondary metabolites and antioxidant activity. Then, dried extracts were subjected to in vitro DPPH scavenging and Cupric reducing (CUPRAC), Fe3+, and Ferric reducing antioxidant power (FRAP). In addition to the antioxidant capacity assays, quantitative phenolic, flavonoid, and secondary metabolite were determined through spectrophotometric and LC-MS/MS chromatographic methods. IC50 values showed that both leaves and the seeds of the R. telianum have high inhibitory properties over DPPH radicals with 20.79 and 5.67 mu g/mL, respectively. The samples' dominant secondary metabolites were evaluated through the LC-MS/MS analysis results. The inhibition effects of both leaves and the seeds of the R. telianum extracts on acetylcholinesterase and butyrylcholinesterase, alpha-glycosidase and human carbonic anhydrases II isoenzyme enzymes, which associated with some global diseases including Alzheimer's disease, type-2 diabetes mellitus and glaucoma were determined. In conclusion, the extracts' contents and functional relationship and the plants' possible usage in the food, medicine, and cosmetic industries was revealed.TUBAIcenter dotlhami Gulcin is a member of the Turkish Academy of Sciences (TUBA). He wants to express his heartfelt gratitude to the TUBA for their financial assistance
Hydrothermal co-carbonization of hazelnut and pistachio shells to hydrochar as potential energy source: Synergistic effects of process parameters on hydrochar characteristics
No full textThe synergistic effects of co-hydrothermal carbonization (co-HTC) of hazelnut and pistachio shells (HS and PS) were aimed to explore and the impacts of blending ratio of feedstocks and retention time on hydrochar characteristics were studied in detail. A remarkable synergistic increment revealed in terms of the mass yield, energy content, and carbon and nitrogen retentions. The higher energy parameters of co-hydrochars showed that coHTC application upgraded the fuel quality of the product. The support of co-HTC process for development of aromaticity and surface enriched with oxygenated functional groups was verified with FTIR spectrum. Anionic and cationic dye adsorptions were conducted to test the removal ability of both single and co-hydrochars. The possible adsorption mechanisms of the dyes were elucidated. This comprehensive research demonstrated that coHTC of HS and PS could be a promising pathway for designing high-performance products for energy and environmental fields
The Industrial Revolution, workers' rights and the development of trade union movements
No full textBu tez, Sanayi Devrimi'nin iş gücü yapısında ve emek ilişkilerinde yol açtığı dönüşümleri inceleyerek, modern işçi haklarının tarihsel temellerini ortaya koymayı amaçlamaktadır. 18. yüzyılın sonlarında İngiltere'de başlayarak tüm Avrupa'ya ve dünyaya yayılan Sanayi Devrimi, üretim araçlarını köklü biçimde değiştirirken aynı zamanda yeni bir toplumsal sınıf olarak işçi sınıfını da ortaya çıkarmıştır. Bu dönüşüm sürecinde işçiler, uzun çalışma saatleri, düşük ücret, sağlıksız çalışma koşulları ve sendikasızlık gibi sorunlarla karşı karşıya kalmış; bu da emek merkezli bir toplumsal mücadele zemini yaratmıştır. Çalışmada, dönemin sosyo-ekonomik yapısı ile işçi hakları arasındaki ilişki tarihsel-sosyolojik bir perspektifle ele alınmış; başta İngiltere olmak üzere Fransa, Almanya ve diğer sanayileşmiş ülkelerde işçi haklarının gelişim süreci değerlendirilmiştir. Çocuk işçiliği, kadın emeği, grev hakkı, sendikal örgütlenme, sosyal güvenlik uygulamaları ve çalışma süreleri gibi temel hak alanları üzerinde durulmuştur. Ayrıca, Sanayi Devrimi'nin yalnızca teknik bir dönüşüm değil, aynı zamanda emek rejiminde yapısal bir değişim olduğu ve bu bağlamda iş hukuku ve sosyal devlet uygulamalarının da temellerini attığı savunulmaktadır. Tezde hem tarihsel belge taraması hem de karşılaştırmalı hukuk yöntemi kullanılarak, işçi haklarının evrensel normlara dönüşüm süreci analiz edilmiştir. Bu bağlamda, modern iş hukukunun temelini oluşturan ilk yasal düzenlemeler, sendikal hareketlerin doğuşu ve Uluslararası Çalışma Örgütü (ILO) gibi küresel kurumların rolü ayrıntılı biçimde ele alınmıştır. Sonuç olarak, Sanayi Devrimi işçi haklarının tarihsel gelişiminde hem bir başlangıç noktası hem de zorlayıcı bir koşullar bütünü olarak değerlendirilmiş; bu çalışma, emeğin hak temelli dönüşümünü anlamada önemli bir katkı sunmayı hedeflemiştir.This thesis aims to examine the transformations in labor structure and industrial relations caused by the Industrial Revolution and to uncover the historical foundations of modern labor rights. The Industrial Revolution, which began in England in the late 18th century and rapidly spread across Europe and beyond, drastically altered the means of production while also giving rise to a new social class—the working class. During this transformation, workers faced long working hours, low wages, unsafe working conditions, and a lack of union representation, leading to a socio-political environment centered around labor-based struggle. The study explores the relationship between the socio-economic conditions of the period and labor rights from a historical-sociological perspective, with a focus on England, France, Germany, and other industrialized nations. Key issues such as child labor, women's labor, the right to strike, unionization, social security systems, and working hours are addressed in detail. The thesis argues that the Industrial Revolution was not merely a technical shift, but a structural transformation in labor regimes, laying the groundwork for labor law and welfare state practices. Through historical document analysis and comparative legal methods, the thesis examines the evolution of labor rights into universal legal norms. Early labor legislation, the emergence of trade union movements, and the role of international organizations such as the International Labour Organization (ILO) are discussed extensively. In conclusion, the Industrial Revolution is evaluated as both a foundational moment and a set of challenging conditions in the historical development of labor rights. This study aims to contribute to a deeper understanding of the rights-based transformation of labor
Categories of harmonic functions in the symmetric unit disk linked to the bessel function
No full textHere in this paper, we establish the basic inclusion relations among the harmonic class (Formula presented.) with the classes (Formula presented.) of starlike harmonic functions and (Formula presented.) of convex harmonic functions defined in open symmetric unit disk U. Moreover, we investigate inclusion connections for the harmonic classes (Formula presented.) and (Formula presented.) of harmonic functions by applying the operator (Formula presented.) associated with the Bessel function. Furthermore, several special cases of the main results are obtained for the particular case (Formula presented.)
Investigation of the relationship of resveratrol and silymarin with learning, memory and some biochemical parameters in rats with epilepsy induced by pentylenetetrazole
No full textAmaç: Epilepsi hastalığında öğrenme ve bellek gerilemektedir. Çalışmamızda epileptik sıçanlarda resveratrol ve silimarin maddesinin öğrenme ve bellek mekanizmasına etkisini incelemeyi amaçladık. Gereç ve Yöntem: Çalışmada toplam 5 grup, (Kontrol grubu, Epilepsi grubu, Resveratrol grubu, Silimarin grubu, Resveratrol +Silimarin grubu) 50 adet erkek Wistar Albino sıçan kullanıldı. Kontrol grubuna 28 gün izotonik çözelti verilirken diğer gruplara ilk 14 gün, gün aşırı pentilentetrazol (PTZ) intraperitoneal (i.p.) uygulandı. Tedavi gruplarına PTZ sonrası 14 gün boyunca tedavi maddeleri intravenöz (i.v.) verildi. 28 gün sonunda sıçanlara yükseltilmiş artı labirent, pasif sakınma ve açık alan testleri uygulandı. Testler sonrasında sakrifiye edilen hayvanlardan alınan kan örneklerinde serum GABA, glutamat, Total antioksaditf stres (TAS), Total oksidatif stres (TOS) düzeyleri analiz edildi. Bulgular: Kontrol grubunda ağırlık olarak haftalar arasında anlamlı bir değer gözlenmemiştir (p>0,05). Epilepsi grubu, epilepsi +resveratrol, Epilepsi +silimarin, resveratrol+silimarin grubunda haftalar arasında kısmen anlamlı bir azalış gözlenmektedir (p0.05). A partially significant decrease was observed between weeks in the epilepsy group, epilepsy + resveratrol, epilepsy + silymarin, and resveratrol + silymarin groups (p<0.05). GABA levels were significantly reduced in the epilepsy group compared to the control group (p<0.05). Glutamate levels were significantly increased in the epilepsy group compared to the control group (p<0.05). TAS levels decreased in the epilepsy group, while TOS levels increased. When learning and memory tests were examined, a significant change was observed in the epileptic group compared to the control group (p<0.05). In the treatment groups, a significant change was observed compared to the epileptic group (p<0.05). Conclusion: In our study, in addition to the therapeutic effects of resveratrol and silymarin, their contribution to learning and memory mechanisms was also observed. In particular, the synergistic effect created when resveratrol and silymarin are administered together contributes more to the learning and memory mechanism
The impact of digital marketing tools on medical tourists' destination choice: The case of Northern Iraq
No full textAmaç: Dijital pazarlama araçları, günümüzün teknoloji tabanlı yaşamının pazarlama alanındaki önemli yeni yöntemlerden biridir. Bu yeni pazarlama yaklaşımı, son yıllarda önemli bir sektör haline gelen tıbbi turizm pazarlamasında da kullanılmaktadır. Bu araştırmanın amacı, dijital pazarlama araçlarının tıbbi turistlerin destinasyon seçimi üzerindeki etkilerini incelemektir. Gereç ve Yöntem: Bu araştırma, kesitsel araştırma türü ve nedensel araştırma modeli olarak tasarlanmıştır. Araştırma verileri, 497 Iraklı tıbbi turistten yüz yüze anket yöntemi ile toplanmıştır. Anket formu, demografik sorulardan ve araştırmacılar tarafından geliştirilen tıbbi turizmde dijital pazarlama araçlarının kullanımına ilişkin 16 maddelik beş boyutlu bir ölçekten oluşmaktadır. Binom lojistik regresyon analizi, Jamovi sürüm 2.4 ile gerçekleştirilmiştir. Bulgular: Lojistik regresyon analizi modelinin anlamlı olduğu bulunmuştur (R2=0.0553, p0,05) ve sosyal medya pazarlama araçları (R2=0,2031, p>0,05) alt boyutları destinasyon seçiminde anlamlı değişkenler değilken, arama motoru optimizasyonu (R2=0,2919, p0.05) and social media marketing tools (R2=0.2031, p>0.05) sub-dimensions were not significant variables in destination choice, but search engine optimization (R2=0.2919, p<0.001), content marketing tools (R2=0.2601, p<0.05) and total scale (R2=0.2052, p<0.05) were found to be statistically significant. According to the model, a 1-unit increase in the search engine optimization score increases the probability of a potential medical tourist choosing the destination by 1.34 times, a 1-unit increase in the content marketing tools score increases the probability of a potential medical tourist choosing the destination by 1.30 times, and a 1-unit increase in the total scale score increases the probability of a potential medical tourist choosing the relevant destination by 1.21 times. Conclusion: Digital marketing tools have been seen as an important criterion in shaping the destination selection of medical tourists. It seems that medical tourism service providers' good use of digital media and seeing it as a marketing tool will increase their preferability
Green extraction strategies and bioactivity of rheum cordatum losinsk: Antioxidant, antimicrobial, and molecular docking insights
No full textThis study aimed to compare the efficiency of different green extraction methods for obtaining bioactive compounds from the roots of Rheum cordatum Losinsk and to evaluate their antioxidant and antimicrobial properties. The presence of some important phytochemicals in the extracts obtained using ultrasound-assisted extraction (UAE), subcritical ethanol extraction (Sbc-EtOH), and supercritical CO2 (ScCO2) extraction was determined by LC-MS/MS, and their antioxidant and antimicrobial properties were examined against Staphylococcus aureus, Enterococcus faecalis, Pseudomonas aeruginosa, and Escherichia coli. The goal was to determine the optimal extraction conditions that maximize the yield of bioactive compounds while preserving their biological properties. Different pressures (100 bar and 400 bar) were tested in UAE extraction, different solvents and times were tested in Sbc-EtOH extraction, and different pressures were tested in ScCO2 extraction. Most of the 53 important phenolic compounds have been extracted using the ScCO2 extraction method, either exclusively or in the highest amounts. It has been observed that more and higher amounts of phenolic compounds were extracted at lower pressure. The highest antioxidant activity was exhibited by the ScCO2 extracts. Additionally, the ScCO2-100 extract obtained at 100 bar showed strong antimicrobial activity, with a minimum inhibitory concentration (MIC) ranging from 31.25 to 250 μg/mL. Gallic acid, epicatechin gallate, epigallocatechin gallate, and catechin were found in extracts. Additionally, molecular docking studies against the 1QWZ, 2ANQ, 3H77, and 6QXS proteins revealed that epicatechin exhibited docking scores of −6.127, −9.479, −5.836, and −7.067 kcal/mol, respectively
An example of soft power in public diplomacy: Analysis of the news in the international media about Alper Gezeravcı
No full textÇalışma Türkiye'nin ilk astronotu Alper Gezeravcı'nın uzaya gönderilme sürecinin, Türkiye'nin kamu diplomasisi bağlamındaki yumuşak güç stratejilerine katkısını incelemektedir. Çalışmanın amacı, bu uzay misyonunun Türkiye'nin uluslararası görünürlüğünü nasıl artırdığını, dış politika hedeflerine ne ölçüde hizmet ettiğini ve ülkenin uluslararası imajına katkı sağlayıp sağlamadığını analiz etmektir. Çalışma, dijital kamu diplomasisi ve yumuşak güç kavramları çerçevesinde yapılandırılmıştır. Araştırma yöntemi olarak Van Dijk'ın Eleştirel Söylem Analizi modeli benimsenmiştir. Bu kapsamda, 17 Ocak-12 Şubat 2024 tarihleri arasında uluslararası dijital medyada yayınlanan Alper Gezeravcı hakkındaki 14 haber incelenmiştir. İnceleme, hem makro yapı (tematik-şematik düzen) hem de mikro yapı (söylem dili, retorik ve sözcük seçimi) analizlerine dayanmaktadır. Çalışmada, haber metinlerinin Türkiye'nin yumuşak güç inşasına nasıl hizmet ettiği ve hangi dilsel stratejilerle uluslararası algının şekillendirildiği ortaya konmuştur. Elde edilen bulgular, Türkiye'nin Alper Gezeravcı'nın uzay görevi aracılığıyla bilim, teknoloji ve uluslararası iş birliği alanlarındaki kapasitesini görünür kıldığını ve bu sayede uluslararası imajını olumlu yönde etkilediğini göstermektedir. Ayrıca, kamu diplomasisinin geleneksel araçlarının yanında dijital medya ve uzay başarılarının da stratejik iletişim unsurlarına dönüştüğü vurgulanmaktadır.The study examines the contribution of the sending of Turkey's first astronaut Alper Gezeravcı into space to Turkey's soft power strategies in the context of public diplomacy. The aim of the study is to analyze how this space mission increased Turkey's international visibility, to what extent it served Turkey's foreign policy objectives and whether it contributed to the country's international image. The study is structured around the concepts of digital public diplomacy and soft power. Van Dijk's Critical Discourse Analysis model was adopted as the research method. In this context, 14 news articles about Alper Gezeravcı published in international digital media between January 17 and February 12, 2024 were analyzed. The analysis is based on both macrostructure (thematic-schematic organization) and microstructure (discourse language, rhetoric and word choice) analysis. The study reveals how the news texts serve Turkey's soft power construction and through which linguistic strategies international perception is shaped. The findings show that through Alper Gezeravcı's space mission, Turkey made its capacity in the fields of science, technology and international cooperation visible and thus positively affected its international image. In addition to the traditional tools of public diplomacy, digital media and space achievements are also emphasized as strategic communication elements