134 research outputs found
Behavior of Soil Reinforcements in Slopes
No full textAbstractIn geotechnical and transportation engineering, especially road constructions in cuts and deep excavation problems are solved by using different supporting excavation methods. Soil reinforcements are chosen due to easy and economic application. In this study, behavior of supported slopes with geotextiles and geogrids were analyzed by performing experiments on slope models in the laboratory. In the experiments, a static loading was applied to find failure surface and deformations for each case. Additionally, slopes were designed by using Plaxis program. At the end of the study, experimental and analytic models were compared and also behavior of models were presented
DC/DC Converters for Multiterminal HVDC Systems: Based on Modular Multilevel Converter
No full textThe increase in the energy demand has resulted in searching for new energy sources. Due to the increased prices of fossil fuels and the environmental issues, renewable energy sources has become popular in Europe. Renewable energy generation such as wind, solar and wave has point-to-point connections with the main grid. In order to minimize the disadvantages of renewable energy sources like energy fluctuations, multi-terminal systems are favoured interconnecting energy generation stations among them with the main grid. The long distance interconnection especially for offshore wind farms and intercontinental connections is not possible with traditional alternating current (AC) technology because of the limited power transfer. Therefore, high voltage direct current (HVDC) technology is considered as the main element for the future multi-terminal grid. The conversion between AC and DC is preferred via voltage source converters (VSC) as they offer more flexible power control compared to traditional current source converters in other words line commutated converters (LCC). HVDC power transmission schemes have been constructed depending on the technology of the time, which means that there is no standardization in voltage levels and configurations of the HVDC schemes. Therefore, the connection of such systems operating at different voltage levels and/or in different schemes such as monopole and bipolar systems for the future multi-terminal DC grids requires DC/DC converters. Although the voltage level and the configurations are the same for both DC systems, DC/DC converter may be required for the power flow control in multi-terminal DC grid. The modular multilevel converter (MMC) seems as the most suitable converter in this application due to its advantages such as low switching losses, high scalability and modularity. MMC control structures are introduced and front-to-front connection of two MMC forming a DC/AC/DC converter is modelled and simulated for different applications such as interconnecting systems with same voltage levels, different voltage levels or different configurations in this study. The passive element sizes of MMC submodules are also compared for different AC side frequency as the component sizes can be decreased thanks to the increase in the AC frequency which has a disadvantage of higher switching losses. Moreover, the designed converters are tested in multi-terminal DC grids to check their performance and functionality.Electrical Engineering, Mathematics and Computer ScienceElectrical Sustainable EnergyErasmus Mundus, European Wind Energy Master (EWEM), Electric Power System Trac
A Novel Biomarker To Predict The Risk Of Contrast-induced Nephropathy In Patients Undergoing Coronary Angiography: Total Bilirubin Phosphorus Ratio
No full textScreening of Zeolitic Imidazolate Frameworks for Preconcentration of Hazardous Chemicals
No full textElevated myocardial extracellular volume fraction as a new predictor of conduction defects after transcatheter aortic valve replacement.
No full textSystemic Immune-Inflammation Index as a Predictor of Asymptomatic Organ Damage in Patients with Newly Diagnosed Treatment-Naive Hypertension
No full textBackground: Low-grade inflammation is known to facilitate the development of hypertensive organ damage. The systemic immune-inflammation index (SII) is a new inflammatory index based on circulating immune-inflammatory cells. Objectives: The objectives of this study were to investigate the relationship between the SII and asymptomatic organ damage (AOD) in patients with newly diagnosed treatment-naive hypertension (HTN). Methods: A total of 500 participants (>= 18 years) were enrolled in the study, including 250 patients and 250 healthy volunteers. Microalbuminuria of > 30 mg/day or proteinuria of > 150 mg/day, left ventricular mass index of > 95 g/m(2) in women and > 115 g/m(2) in men, and carotid intima-media thickness of > 0.9 mm or the presence of plaque in the carotid were evaluated as AOD indicators. AOD grade was classified as follows: Grade I - One organ involved, Grade II - Two organs involved, Grade III - Three organs involved, and Grade IV - Four organs involved. Results: SII values were higher among patients with HTN than in the control group. Positive correlations were found between the SII and AOD indicators and C-reactive protein levels. Increasing SII values were a common independent predictor of the presence and severity of AOD. The gradually increasing threshold values of the SII from no AOD to Grade III-IV exhibited high diagnostic performance. Conclusions: High SII values were independent predictors of the presence and severity of AOD in patients with newly diagnosed treatment-naive HTN. Considering the role of inflammation in HTN, the SII, which can be easily evaluated using blood parameters, can be an effective prognostic screening tool. ( REV INVEST CLIN. 2022;74(5):258-67
TCT-1023 Comparative Effectiveness of DES, DCB, and BMS for the Treatment of In-Stent Restenosis in Carotid Artery Stents: A Systematic Review and Meta-Analysis
No full textBackground: In-stent restenosis (ISR) following carotid artery stenting is a challenging complication associated with an increased risk of cerebrovascular events. Various endovascular approaches—including drug-eluting stents (DES), drug-coated balloons (DCB), and bare-metal stents (BMS)—are employed for ISR treatment. This study compares the clinical outcomes of these treatment modalities. Methods: A systematic review and meta-analysis of studies from 2005–2024 was conducted. Outcomes included restenosis rate, stroke, target lesion revascularization (TLR), and mortality. Subgroup analyses by patient comorbidities and lesion characteristics were also performed. Results: A total of 12 studies comprising 1,284 patients were included (DES: 478; DCB: 412; BMS: 394). DES had the lowest rate of recurrent ISR (7.2%), followed by DCB (12.8%) and BMS (22.4%). TLR was lowest in the DES group (5.1%) compared to DCB (10.6%) and BMS (17.3%). Stroke and mortality rates were similar across groups. Conclusion: DES appears to offer superior efficacy in preventing recurrent carotid ISR and reducing the need for revascularization. DCBs are a viable alternative in high-risk patients where stenting is undesirable. BMS should be reserved for select cases given higher restenosis and TLR rates. Categories: ENDOVASCULAR: Stroke, Stroke Prevention, Carotid Interventio
TCT-1231 Comparison of Micropuncture Versus Ultrasound-Guided Arterial Access Techniques: A Systematic Review of Patient Outcomes and Procedural Safety
No full textBackground: Arterial access is foundational to many endovascular procedures. Micropuncture and ultrasound-guided techniques are increasingly used to minimize complications. This study compares these two methods in terms of access success, procedural complications, and clinical outcomes. Methods: A systematic review and pooled analysis was conducted on studies comparing micropuncture and ultrasound-guided arterial access in femoral and radial procedures. Key endpoints included access success rate, access time, hematoma formation, pseudoaneurysm, and need for surgical repair. Results: Seven studies with 2,840 patients (micropuncture: n=1,420; ultrasound-guided: n=1,420) were included. Ultrasound guidance showed superior first-pass success (93.8% vs. 87.1%, p\u3c 0.001) and reduced access site complications, especially hematomas (1.8% vs. 4.7%, p=0.02). Micropuncture offered shorter mean access time in radial access procedures. Pseudoaneurysm formation was significantly lower with ultrasound guidance (0.2% vs. 1.1%, p=0.01). Conclusion: Ultrasound-guided arterial access demonstrates a superior safety profile and higher success rate compared to micropuncture techniques, especially for femoral access. Micropuncture remains valuable for radial access and high-risk patients due to smaller initial puncture size. Categories: CORONARY: Vascular Access: Coronar
Alewiten Bd. 2, Glaube und Tradition
No full textInhaltsverzeichnis: Birinci Boeluem / Erster Abschnitt: Inanc Bicimleri ve Dini Hayat / Glaubensvorstellungen und religioeses Leben (15-24); Mehmet Yaman: Alevilerin Inanc ve Ibadetlerinin Temel Kitabi: Buyruk Buyruk: Das Buch der alewitischen Glaubensvorstellungen und Riten (Zusammenfassung) (24); Musa Baran: Tahtacilarda Musahiplik Toereni (25) Die Musahiplik-Zerimonie bei den Tachtadschi (Zusammenfassung) (35-36); Ali Yildirim: Alevilikte Hukuk Sistemi: (37-50); Das Rechtssystem bei den Alewiten (Zusammenfassung) (51-52); Mehmet Yaman: Alevilikte Kurban Gelenegi (53-60); Opferriten im Alewitentum (Zusammenfassung (60); Ilhan Cem Erseven: Alevi-Bektasi Kueltrueruende 'Semahlar' (61-79); Der Semah in der Kultur des Alewiten- und des Bektaschitums (Zusamemnfassung) (80); Ikinci Boeluem/Zweiter Abschnitt: Halk Inanclari ve Uygulamalari / Volksglaube und Riten: Kutlu Oezen: Sivas Alevilerinde Kutsal Yerler ve Yatir Inanxi (81-96); Heilige Orte und Graeber der Provinz Sivas (Zusammenfassung) (97-98); Ilyas Kuecuekcan: Seyyid Battal Gazi Kuelliyesi'nde Adak ve Inanc Gelenekleri (99-106); Wallfahrtsbraeuche am Grab des Seyyid Battal Gazi (Zusamemnfassung) (107-108); Sinan Kahyaoglu: Kazdagi Tahtacilarinda Kutsal Hayvanlar ile Bitkiler ve Toplum Hayatina Etkileri (109-124); Icindekiler /Inhalt: Die Rolle heiliger Tiere und Pflanzen im Alltagsleben der Tachtadchi vom Kazdagi (Zusamemnfassung) (124-126); Aydin Ayhan: Balikesir Yoeresinde Sagaltma Islevli Bazi Bektasi Ocaklari ve Bazi Alevi Koeylerinde Yatirlar, Kutsal Agaclar ve Sagaltma Ocaklari (127-135); Heiligengraeber, Kultstaetten und Heilpraktiken der Bektaschi und der Alewiten in der Gegend von Balikesir (Zusamemnfassung) (135-136); Veli Asan: Tahtacilarda Cenaze Toerenleri (137-146); Bestattungs- uns Totenbraeuche bei den Tachadschi (Zusamemnfassung) 146-148); Kemal Astare: Glaubensvorstellungen und religioeses Leben der Zaza-Alewiten (149-161); Zaza-Alevilerinin Inanc Bicimleri (Oezet) (162); Uecuencue Boeluem /Dritter Abschnitt: Dini Yansimasi Olarak Sanat ve Zanaat / Kunst und Handwerk als Spiegel des Glaubens: Fatma Ahsen-Turan: Tuerk Edebiyatinda Ehl-i Beyt Sevgisi ve Buna Bagli Tezahuerler (163-177); Das Motiv der Ehl-i Beyt-Verehrung in der klassischen tuerkischen Literatur (Zusamemnfassung) (177-178); Ahmed Yueruer: Asyali Bir Kimlik Oegesi Olarak Alewi Muezigi (179-197); Das asiatische Identitaetsmoment in der alewitischen Musik (Zusamemnfassung) (198); Ursula Reinhard: Die Musik der Alewiten (199-219); Oezet: Alevilerinin Muezigi (220); Ayten Kaplan: Tahtacilarda Etnomuezikolojik Bir Inceleme (221-233); Musikethnologische Untersuchungen bei den Tachtadschi (Zusammenfassung) (233-234); Kemal Suezgec: Kunst und Bild der Alewiten (235-243); Oezet: Alevilerde Sanat ve Resim (243-244); Yakup Karahan: Kendisi ve Digeri: Bir Alevi Cizein Karikatuerleri. Das Eigene und das Andere: Karikaturen eines alewitischen Zeichners (245-250); Ismail Oeztuerk: Tuerkiye' de Aleviligin Geleneksel Tuerk El Sanatlarina Etkisi ve Alevi-Bektasi Sanatina Iliskin Bazi Oernekler (251-260); Beispiele zum Einfluss des Alewitentums auf das Kunsthandwerk in der Tuerkei (Zusamemnfassung) (261-262); Veli Asan: Tahtacilarda Gelenesel Tahtacilik Zanaati (263-273); Die traditionellen Holzbearbeitungsgeraete der Tachtadschi (Zusammenfassung) (273-274); Ibrahim Bahadir: Alevilikte Erkan Farkliliklari ve Onlarin Mimariyle Sembollere Etkisi (275-289); Unterschiede in der Imam-Zaehlung und ihr Niederschlag in der Symbolik alewitischer Architektur (Zusammenfassung) (289-290); Bircan Coskun: Goecebeligin ve Yerlesik Kueltueruen, Tahtacilarda Mekanla Ilgili Yansimalari Uezerine (291-297); Die Reflexion von Nomadismus und Sesshaftigkeit in Wohnhaus und Siedlung der Tachtadschi (Zusammenfassung) (297-298); Selim Veliglu: Cem Kueltuerevi Tasarimi (299-301); Das Cem-Kulturhaus-Projekt (Zusammenfassung) (297-298)Available from UuStB Koeln(38)-28A7501 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman
XELOX plus bevacizumab vs. FOLFIRI plus bevacizumab treatment for first-line chemotherapy in metastatic colon cancer: a retrospective study of the Anatolian Society of Medical Oncology
No full text- …
