01. Araştırma Çıktıları | TR-Dizin | WoS | Scopus | PubMed

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1,25-Dihydroxyvitamin D3 Induces N-Myc Downstream Regulated Gene-2 Expression in Papillary Thyroid Carcinoma Cells
(Dokuz Eylul Univ Inst Health Sciences, 2020) Sipahi, Murat; Bartik, Didem Keles; Doruk, Mehmet; Bayraktar, Firat; Oktay, Gulgun
Purpose: In addition to its role in serum calcium homeostasis, the anti-tumor function of 1,25-dihydroxyvitamin D-3 (calcitriol) in cancer development is well established. N-myc Downstream Regulated Gene 2 which functions as a tumor suppressor gene has recently been shown to be downregulated in various cancer leading to increased tumor incidence, progression and metastasis. The goal of this study was to investigate the possible effects of calcitriol treatment on NDRG2 expression in BCPAP papillary thyroid carcinoma cells. Methods: The experiments were carried on human primary thyroid follicular epithelial cells (Nthy-ori-3-1), and human papillary thyroid carcinoma cells (BCPAP). The half maximal inhibitory concentration (IC 50) of calcitriol on BCPAP cells was determined by WST-1 assay. BCPAP cells were treated with 15 and 30 mu M calcitriol for 24, 48, and 72 hours, respectively. Basal NDGR2 expression in Nthy-ori-3-1 and BCPAP cells as well as the alterations on NDRG2 expression in calcitriol treated BCPAP cells were evaluated with western blot. Results: A significant downregulation of NDRG2 was observed in BCPAP cells when compared to Nthy-ori-3-1 cells (p<0.01). IC50 dose of calcitriol was found to be 64, 54 and 43 mu M for 24, 48 and 72 hours, respectively. NDRG2 protein expression levels were significantly increased in 30 mu M calcitriol treated BCPAP cells after 48 hours (p<0.05). Conclusions: Calcitriol induced NDRG2 protein expression in BCPAP cells. We predict that calcitriol increased NDRG2 protein levels in BCPAP cells via c-Myc repression, which is upregulated by aberrant Wnt/beta-catenin signaling. Further investigation is required to enlighten the possible effect mechanisms of calcitriol in BCPAP cells.
Citation - WoS: 238
1-D Convolutional Neural Networks for Signal Processing Applications
(IEEE, 2019) Kiranyaz, Serkan; İnce, Türker; Abdeljaber, Osama; Avcı, Onur; Gabbouj, Moncef
1D Convolutional Neural Networks (CNNs) have recently become the state-of-the-art technique for crucial signal processing applications such as patient-specific ECG classification, structural health monitoring, anomaly detection in power electronics circuitry and motor-fault detection. This is an expected outcome as there are numerous advantages of using an adaptive and compact 1D CNN instead of a conventional (2D) deep counterparts. First of all, compact 1D CNNs can be efficiently trained with a limited dataset of 1D signals while the 2D deep CNNs, besides requiring 1D to 2D data transformation, usually need datasets with massive size, e.g., in the Big Data scale in order to prevent the well-known overfitting problem. 1D CNNs can directly be applied to the raw signal (e.g., current, voltage, vibration, etc.) without requiring any pre-or postprocessing such as feature extraction, selection, dimension reduction, denoising, etc. Furthermore, due to the simple and compact configuration of such adaptive 1D CNNs that perform only linear 1D convolutions (scalar multiplications and additions), a real-time and low-cost hardware implementation is feasible. This paper reviews the major signal processing applications of compact 1D CNNs with a brief theoretical background. We will present their state-of-the-art performances and conclude with focusing on some major properties.
Citation - Scopus: 318
1-D Convolutional Neural Networks for Signal Processing Applications
(Institute of Electrical and Electronics Engineers Inc., 2019) Kiranyaz, Serkan; İnce, Türker; Abdeljaber, O.; Avci, O.; Gabbouj, M.
1D Convolutional Neural Networks (CNNs) have recently become the state-of-the-art technique for crucial signal processing applications such as patient-specific ECG classification, structural health monitoring, anomaly detection in power electronics circuitry and motor-fault detection. This is an expected outcome as there are numerous advantages of using an adaptive and compact 1D CNN instead of a conventional (2D) deep counterparts. First of all, compact 1D CNNs can be efficiently trained with a limited dataset of 1D signals while the 2D deep CNNs, besides requiring 1D to 2D data transformation, usually need datasets with massive size, e.g., in the »Big Data» scale in order to prevent the well-known »overfitting» problem. 1D CNNs can directly be applied to the raw signal (e.g., current, voltage, vibration, etc.) without requiring any pre- or post-processing such as feature extraction, selection, dimension reduction, denoising, etc. Furthermore, due to the simple and compact configuration of such adaptive 1D CNNs that perform only linear 1D convolutions (scalar multiplications and additions), a real-time and low-cost hardware implementation is feasible. This paper reviews the major signal processing applications of compact 1D CNNs with a brief theoretical background. We will present their state-of-the-art performances and conclude with focusing on some major properties. Keywords - 1-D CNNs, Biomedical Signal Processing, SHM. © 2019 IEEE.
16. Yüzyıl Giysi Tarihi Yazımı Üzerine: Giysilerde Doğu-batı Etkileşimi, Egzotizm ve Güç
(2013) Er, Fehmiye Dilek
Moda tarihinde batılı-olmayan giysilerin sunum ve dekorasyonları her zaman fantastik, büyüleyici, epik, dikkat çekici, egzotik, ruhani, zamansız ve değişmez gibi sözlerle ifade edilmiştir. Doğulu giysiler ve görünümler üzerindeki bu yaklaşım batılı anlayışın diğer kültürler üzerindeki yüceliğini, farklılığını ve gücünü gösterme arzusuyla yakından ilişkilidir. 19. yüzyıldan başlamak suretiyle doğunun dikkat çekici sunumları, batı giysi tarihinde batılı olmayan giysilerdeki teknik ustalıklar ve bu giysilerdeki özgün motifler egzotik olarak değerlendirilmiştir. Bu amaçla hem giysi tarihi hem de modern moda tarihi yazımında doğunun her zaman egzotik, primitif, öteki ve otantik olma noktasında bir söylem söz konusu olmuştur. Özellikle 16. yüzyıl Osmanlı İmparatorluğu?na ait egzotik giysiler ve kumaş teknikleri aynı dönem Avrupa modasına yoğun bir şekilde adapte edilirken giysiler ihtişamın ve gücün de bir göstergesi olmuşlardır. Bu çalışmada giysi tarihi açısından Osmanlı İmparatorluğu?nun en gösterişli dönemlerinden biri olan 16. yüzyılda giyilen Avrupalı giysilerinde Osmanlı giysi kültürünün izleri, egzotizm kavramı çerçevesinden incelenecektir. Bu çalışmada batılı giysilerdeki egzotik gösterimler aracılığı ile okumalar yapılırken, “egzotizm” kavramı, batıya ait olmayanı anlatma noktasında ele alınacaktır. Çalışma gücün kullanımı ve ihtişamın anlatımı olarak kullanılan lüks kumaşlardan üretilen egzotik giysi ve aksesuarları,16. yüzyılda Osmanlı İmparatorluğu?nda kullanılan giysilerin aynı dönem Avrupa modasına adapte edilme biçimlerini de içerecektir.
1946-1949 Dönemi Basınına Toplu Bakış*
(2015) Akan, Aysun
Tek Parti iktidarı boyunca siyasal iktidarın sıkı kontrolünde olan basın demokrasiye geçiş dönemi olarak adlandırılan 1946-1949 yıllarında, yasalarda yapılan değişiklerden dolayı rahatlamış ve yeni oluşan siyasal ortamda siyasal mücadelenin bir alanı haline gelmiştir. Anı- lan dönemde yayınlanmaya başlayan gazete ve dergilerin ağırlıklı olarak siyasal içerikli olması basının varolan siyasal çeşitliliği yansıtma konusunda etkili olduğunu göstermektedir. Ancak aynı dönemde sanat, edebiyat ve kültür ile ekonomi, ticari ve sanayi alanlarındaki yayınların sınırlılığı ülkenin sosyal, ekonomik ve kültürel gelişmişlik seviyesinin bir göstergesidir.
1950-1960 Yıllarında Türkiye ile Sovyetler Birliği Arasındaki İlişkiler
(2014) Kurban, Vefa
Türkiye ile Sovyetler Birliği arasındaki ilk temasların Mustafa Kemal Paşa’nın 26 Nisan 1920 tarihinde Lenin’e yazdığı mektupla başladığı söylenebilir ve bu dönem iyi komşuluk ve dostluk ilişkileriyle tanımlanabilir. Mustafa Kemal Paşa’nın vefatı, İkinci Dünya Savaşı’nın başlaması, Stalin’in Türkiye’den toprak talebi ve Boğazlar rejiminde değişiklik talepleri, ayrıca Soğuk Savaş’ın da etkisiyle iki ülke arasındaki ilişkiler farklı boyut kazanmıştır. 1950’li yılların başlarındaki Türk dış siyasetinin esas prensiplerini, bazı Sovyet araştırmacıları, anti-komünizm ve Sovyet karşıtlığı olarak görmekte ve bu durumu eleştirmektedirler. Stalin’in ölümünden sonra Sovyetler Birliği’nin Türkiye’den bundan böyle toprak talebinde bulunmayacağını resmi bir şekilde bildirmesinin yanında, Sovyetler Birliği ile ticari anlaşmalar imzalaması, Türk ve Sovyet siyasileri arasındaki ilişkiler, karşılıklı ziyaret planları Amerika’nın da dikkatinden kaçmamıştır.
Citation - WoS: 1893
Citation - Scopus: 2230
1d Convolutional Neural Networks and Applications: a Survey
(Academic Press Ltd- Elsevier Science Ltd, 2021) Kiranyaz, Serkan; Avcı, Onur; Abdeljaber, Osama; İnce, Türker; Gabbouj, Moncef; Inman, Daniel J.
During the last decade, Convolutional Neural Networks (CNNs) have become the de facto standard for various Computer Vision and Machine Learning operations. CNNs are feed-forward Artificial Neural Networks (ANNs) with alternating convolutional and subsampling layers. Deep 2D CNNs with many hidden layers and millions of parameters have the ability to learn complex objects and patterns providing that they can be trained on a massive size visual database with ground-truth labels. With a proper training, this unique ability makes them the primary tool for various engineering applications for 2D signals such as images and video frames. Yet, this may not be a viable option in numerous applications over 1D signals especially when the training data is scarce or application specific. To address this issue, 1D CNNs have recently been proposed and immediately achieved the state-of-the-art performance levels in several applications such as personalized biomedical data classification and early diagnosis, structural health monitoring, anomaly detection and identification in power electronics and electrical motor fault detection. Another major advantage is that a real-time and low-cost hardware implementation is feasible due to the simple and compact configuration of 1D CNNs that perform only 1D convolutions (scalar multiplications and additions). This paper presents a comprehensive review of the general architecture and principals of 1D CNNs along with their major engineering applications, especially focused on the recent progress in this field. Their state-of-the-art performance is highlighted concluding with their unique properties. The benchmark datasets and the principal 1D CNN software used in those applications are also publicly shared in a dedicated website. While there has not been a paper on the review of 1D CNNs and its applications in the literature, this paper fulfills this gap. (C) 2020 The Author(s). Published by Elsevier Ltd.
2011-2013 Constitution-Making Process and Media Field in Turkey
(2019) Akın, Altuğ; Yaman Akyar, Burcu
This paper examines so-called “Constitutional Process” which took place between 2011 and 2013 in Turkey to eventually fail after more than two years of intense work and rise of expectations both in Turkish society and international community from the perspective of media and communications. How Turkish media influenced the constitution making process including workings of Constitutional Conciliation Commission is discussed, surveying relevant media content or performance with a particular focus on the political economy of Turkish media during that period. Traditional media outlets such as newspapers and television channels, and nowadays largely digital platforms, function as present-day agoras where political agenda is determined and contested. These online and offline channels have different levels of influence on discussions of the political elite, as presented extensively in media and communication studies. Together with the global media environment, national media foster the emergence of its own elites, while maintaining multi-layered relationships with high-level political decision-making processes. Media channels therefore bear symbolic powers that impact political policymaking by employing methods such as agenda setting and framing. In this line of thought, this article approaches Turkish media space as a specific field while its content and its political economy are examined in relation with the constitution making process to reveal the role played by media during highly politicized processes, such as constitution making, as well as eliciting the dynamics that herald such media performance.
24 Saatlik İdrarda Protein Atılımının Tanılayıcı Kullanımı ve Advers Perinatal Sonuçlar ile Doğum Zamanı için Protein-kreatinin Oranı
(2021) Gölbaşı, Hakan; Ömeroğlu, İbrahim; Dereli Akdeniz, Didem; Ekin, Atalay; Gölbaşı, Ceren
Amaç: Çal›flmam›zda, proteinürisi olan veya olmayan hipertansif gebelerde perinatal ve neonatal sonuçlar› de¤erlendirmeyi amaçla- d›k. Spot üriner protein ile kreatinin oran›n›n (P/C) ve 24-saatlik protein at›l›m›n›n sonuçlar üzerindeki prediktivitesini karfl›laflt›r- d›k. Yöntem: Gebeli¤in 20. ve 37. haftalar› aras›nda yeni hipertansiyon tan›s› alm›fl 230 gebe retrospektif olarak çal›flmaya dahil edildi. Al›- nan 24 saatlik idrar ve P/C ile belirlenen protein seviyesine göre hastalar iki gruba ayr›ld›. Proteinüri varl›¤› ve seviyesi, P/C oran›y- la olan iliflkisi ve bu bulgular ile perinatal sonuçlar aras›ndaki iliflki de¤erlendirildi. Bulgular: Do¤um esnas›ndaki gestasyonel yafl ve gecikme dönemi (hipertansiyon tan›s› ile do¤um aras›ndaki süre), ?300 mg/24 saat ve P/C ?0.3 de¤erlerine sahip gebelerde anlaml› flekilde daha er- kendi. Advers neonatal sonuçlar, proteinürisi ?300 mg/24 saat ve P/C?0.3 olan hastalarda anlaml›yd›. 24 saatlik idrarda üriner pro- tein seviyeleri, P/C ?0.3 de¤erine sahip gebelerde anlaml› flekilde daha yüksekti ve 24 saatlik proteinüri ile P/C aras›nda anlaml› fle- kilde pozitif bir korelasyon bulundu (r=0.382, p<0.001). Sonuç: Çal›flmam›z, hipertansif gebelerde 24 saatte ?300 mg’lik bir protein kayb› ve spot idrarda ?0.3’lük bir P/C oran›n›n advers perinatal sonuçlarla iliflkili oldu¤unu ortaya koymufltur. Ayr›ca, hi- pertansif gebelerde ?300 mg/gün seviyesinde proteinürinin ve ?0.3’lük spot idrar P/C oran›n›n bu gebeleri erken do¤um riskine e¤ilimli k›ld›¤›n› tespit ettik.
Citation - WoS: 1
Citation - Scopus: 1
25-Hydroxyvitamin Levels in Sjögren’s Syndrome: Is It the Right Time to Dismiss the Case or Not
(Walter de Gruyter GmbH, 2024) Sımsır, Ilgın Yıldırım; Tanigor, Goksel; Karabulut, Gonca; Barutcuoglu, Burcu; Yılmaz, Zevcet
Objectives: This study aimed to investigate whether patients with primary Sjögren syndrome (SjS) have different levels of 25 OH-D3 (vitamin D) when compared to healthy populations and whether differences in 25 OH-D3 correlated with disease activity or markers. Methods: Eighty-eight female patients with SjS and 3,338 age-matched healthy female controls were included in this study. 25 OH-D3 levels were compared with healthy controls. Then the patients were stratified according to their 25 OH-D3 levels, either insufficient/deficient or normal (<50 nmol/L or ≥50 nmol/L). The disease activity was evaluated using The EULAR SjS disease activity index (ESSDAI) and its components. Correlation analyses were also performed for a possible correlation with disease characteristics and markers of activity. Results: No differences in 25 OH-D3 levels were found between SjS and healthy populations (p>0.05). No correla- tions were found between patient characteristics or labo- ratory values (p>0.05). Conclusions: This study did not find a link between disease characteristics and disease activity and 25 OH-D3 levels. Prospective studies with more patients should be conducted to reach a conclusion.
Citation - WoS: 1
Citation - Scopus: 2
2d Model of a Biomass Single Particle Pyrolysis-Analysis of the Influence of Fiber Orientation on the Thermal Decomposition Process
(Mdpi, 2025) Hercel, Paulina; Orhon, Atahan; Jozwik, Michal; Kardas, Dariusz
Understanding the influence of heat transfer on the pyrolysis process is crucial for optimizing industrial biofuel production processes. While numerous scientific studies focus on experimental investigations of pyrolysis using laboratory-scale devices, many neglect the essential role of thermal energy in initiating and controlling thermal decomposition processes. This study presents a transient two-dimensional numerical model of biomass single-particle pyrolysis, which includes the energy balance, mass conservation equations and pyrolysis gas pressure and velocity equations. The model employs explicit numerical methods to manage the high computational demands of 2D transient simulations, but is successfully validated with the use of experimental data found in the literature. The model reflects the heterogeneous structure of wood by using different thermal conductivity coefficients depending on the wooden fibers' orientation. The results demonstrate the impact of fiber orientation on the heat transfer and thermal decomposition processes. The anisotropic properties of wood led to varied temperature fields and pyrolysis decomposition stages, aligning well with experimental data, thus validating the model's accuracy. The proposed approach can provide a better understanding and lead to improvement in biofuel production processes, enabling more efficient and controlled conversion of biomass into fuel. By optimizing the pyrolysis process, it contributes to the development of sustainable energy preservation and regeneration methods, supporting a shift towards more sustainable fuel production patterns using renewable biomass resources like wood.
Citation - WoS: 6
Citation - Scopus: 7
2db: a Proteomics Database for Storage, Analysis, Presentation, and Retrieval of Information From Mass Spectrometric Experiments
(Biomed Central Ltd, 2008) Allmer, Jens; Kuhlgert, Sebastian; Hippler, Michael
Background: The amount of information stemming from proteomics experiments involving (multi dimensional) separation techniques, mass spectrometric analysis, and computational analysis is ever-increasing. Data from such an experimental workflow needs to be captured, related and analyzed. Biological experiments within this scope produce heterogenic data ranging from pictures of one or two-dimensional protein maps and spectra recorded by tandem mass spectrometry to text-based identifications made by algorithms which analyze these spectra. Additionally, peptide and corresponding protein information needs to be displayed. Results: In order to handle the large amount of data from computational processing of mass spectrometric experiments, automatic import scripts are available and the necessity for manual input to the database has been minimized. Information is in a generic format which abstracts from specific software tools typically used in such an experimental workflow. The software is therefore capable of storing and cross analysing results from many algorithms. A novel feature and a focus of this database is to facilitate protein identification by using peptides identified from mass spectrometry and link this information directly to respective protein maps. Additionally, our application employs spectral counting for quantitative presentation of the data. All information can be linked to hot spots on images to place the results into an experimental context. A summary of identified proteins, containing all relevant information per hot spot, is automatically generated, usually upon either a change in the underlying protein models or due to newly imported identifications. The supporting information for this report can be accessed in multiple ways using the user interface provided by the application. Conclusion: We present a proteomics database which aims to greatly reduce evaluation time of results from mass spectrometric experiments and enhance result quality by allowing consistent data handling. Import functionality, automatic protein detection, and summary creation act together to facilitate data analysis. In addition, supporting information for these findings is readily accessible via the graphical user interface provided. The database schema and the implementation, which can easily be installed on virtually any server, can be downloaded in the form of a compressed file from our project webpage.
Citation - WoS: 4
Citation - Scopus: 5
3d Helmholtz Coil System Setup for Thermal Conductivity Measurements of Magnetic Nanofluids
(Pergamon-Elsevier Science Ltd, 2023) Alsangur, Rahime; Dog, Serkan; Ateş, Ismet; Turgut, Alpaslan; Çetin, Levent
This study aims to design a mechatronic system that involves a 3D Helmholtz coil system implemented with the 3 omega; method to measure the thermal conductivity of magnetic nanofluids under uniform and rotating magnetic fields. For this purpose, a 3D Helmholtz coil system was designed and manufactured to generate a uniform and rotating magnetic field up to 400 G. First, the uniformity and rotation abilities of the magnetic field generated by the system were investigated numerically and experimentally. The investigations pointed out that the 3D Helmholtz coil system can generate a uniform magnetic field in 1D, 2D, and 3D with a maximum non-uniformity factor of 0.0016. After that, the thermal conductivity of Fe3O4 - water magnetic nanofluid samples with 1, 2, 3, 4, and 4.8 vol.% were measured under 1D, 2D, and 3D uniform magnetic field application. The magnetic field was applied at different direction angles between X, Y, and Z axes in the Cartesian coordinate system. The results pointed out that the thermal conductivity of the samples increases as the magnetic field and particle concentration increase. The maximum thermal conductivity enhancement was observed as similar to 9.1% and the minimum thermal conductivity was observed as similar to 1.9% when the magnetic field is applied in parallel and perpendicular directions, respectively. The measurement results also pointed out that under the external uniform magnetic field application at 2D and 3D, thermal conductivity enhancement is less affected by the particle concentration increment.
3d Printing With Bacterial Cellulose-Based Bioactive Composites for Design Applications
(Ecaade-education & research computer aided architectural design europe, 2022) Turhan, Gözde Damla; Afşar, Seçil; Özel, Berfin; Doyuran, Aslıhan; Varinlioglu, Güzden; Bengisu, Murat
The bacterial cellulose (BC) biofilms are explored in design applications as replacements to petroleum-based materials in order to overcome the irreversible effects of the Anthropocene. Unlike biomaterials, designers as mediators could collaborate with bioactive polymers as a form of wetware to manufacture living design products with the aid of novel developments in biology and engineering. Past and ongoing experiments in the literature show that BC has a strong nanofibril structure that provides adhesion for attachment to plant cellulose-based networks and it could grow on the surfaces of the desired geometry thanks to its inherited, yet, controllable bio-intelligence. This research explores BC-based bioactive composites as wetware within the context of digital fabrication in which the methodology involves distinct, yet integrated, three main stages: Digital design and G-code generation (software stage); BC cultivation and printable bioactive composite formulation (wetware stage); digital fabrication with a customized 3D printer (hardware stage). The results have shown that the interaction of BC and plant-based cellulose fibers of jute yarns has enhanced the structural load-bearing capacity of the form against compressive forces, while pure BC is known only by its tensile strength. Since the outcomes were fabricated with the use of a bioactive material, the degradation process also adds a fourth dimension: Time, by which the research findings could further establish a bio-upcycling process of wastes towards biosynthesis of valuable products. Moreover, developing a BC-based bioactive filament indicates potentially a feasible next step in the evolution of multiscale perspectives on the growth of habitable living structures that could reinforce the interaction between nature and architecture through collaboration with software, hardware, and wetware in innovative and sustainable ways.
4483 Sayılı Kanun Uyarınca İtiraz Merciinin "İdari" Niteliği Sorunu
(2024) Karahan, Barış
Memurlar ve diğer kamu görevlilerinin yargılanması konusunda genel kanun niteliği taşıyan 4483 sayılı Memurlar ve Diğer Kamu Görevlilerinin Yargılanması Hakkında Kanun bu kişilerin görevleri sebebiyle işlediği suçların soruşturulmasını kural olarak izne tabi tutmaktadır. İzin vermeye yetkili makam anlamına gelen yetkili merci kararlarının yine “idari” nitelikte olacağı öngörülen itiraz merci kararıyla inceleneceği öngörülmüştür. İtiraz merci eldeki işin bir dava, kendisinin de bir mahkeme olmadığını birçok kararında vurgulamakta ve yaptığı incelemelerde 2577 sayılı İdari Yargılama Usulü Kanununu uygulamayarak bunu teyit etmektedir. Bununla birlikte temel hak ve özgürlüklerin korunması amacı ağır bastığında bu yaklaşımdan sapıldığı görülebilmektedir. Bu çalışmada temel hak ve özgürlüklerin korunması amacı ağır bastığında itiraz merciinin “idari” niteliğinin sürdürülüp sürdürülemeyeceği tartışılmaktadır.
44th Febs Congress, From Molecules To Living Systems (2019) Posters (vol 9, Pg 65, 2019)
(Wiley, 2019) Said, Harun Muayad; Gul, Guler; Akdoğan, Gül; Soysal, Yasemin
[Abstract Not Available]
The 6-Minute Threshold: Tracking Three-Year Disability and Cognition in Multiple Sclerosis
(Sage Publications Ltd, 2025) Unal, Gozde Deniz; Caliskan, Can; Zengin, Ela; Ozakbas, Serkan
Aa7475-t7351 ve Aa2219-t851 Alaşımlarının Frezelenmesinde Kesici Takım Kaplamalarının ve Kesme Parametrelerinin Yüzey Pürüzlülüğü Üzerine Etkisinin Deneysel Olarak İncelenmesi
(2024) Gençalp Irizalp, Simge; Karaoğlu, Handenur; Erçayhan, Yiğit; Akgün Kayral, Selda
Bu çalışmada AA 2219-T851 ve AA 7475-T7351 alaşımlarının frezelenmesinde kesme hızı (500, 600, 700m/dk), ilerleme miktarı (0,1 ve 0,15 mm/diş) ve talaş derinliği (1 ve 8 mm) değişkenleri kullanılmış ve kaplamasız tungsten karbür (WC) kesici uç ve zirkanyum nitrür (ZrN) kaplamalı kesici uç kullanılarak kesme parametrelerinin yüzey pürüzlülüğü üzerindeki etkileri incelenmiştir. Deneyler sonucunda en ideal yüzey kalitesinin elde edildiği kesme hızı, ilerleme miktarı, talaş derinliği ve kesici uç belirlenmiştir. Sonuç olarak, iki farklı mekanik dayanıma sahip alüminyum alaşımının yüzey sonuçları karşılaştırılıp optimum işleme değerleri bulunmuştur. En düşük yüzey pürüzlülüğü 700 mm/dk kesme hızı, 0,1 mm/diş ve 1 mm ilerleme miktarı parametrelerinde elde edilmiş ve ilerleme hızı arttıkça yüzey kalitesinin artmasının yanında ZrN kaplamalı kesici uç kullanılması ile daha iyi yüzey özelliklerine ulaşılmıştır.
An Abbreviated History of Liver Transplantation
(Wolters Kluwer Medknow Publications, 2024) Schilsky, M.L.; Emre, S.H.
[No abstract available]
Abernethy Syndrome Presenting With Hepatopulmonary Syndrome, Hematuria and Multiple Fnhs
(Lippincott Williams & Wilkins, 2018) Farajov, R.; Iakobadze, Z.; Yilmaz, C.; Karaca, C.; Kilic, K.; Kul, G.; Tosun, A.
[Abstract Not Available]

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