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Does combination of urodynamic reduced bladder capacity and detrusor overactivity warrant spinal cord magnetic resonance imaging in children with persistan enuresis: a prospective study
No full textPurpose: This study aims to evaluate the necessity of spinal cord magnetic resonance imaging (MRI) in children with persistent enuresis, specifically those presenting with urodynamically reduced bladder capacity (RBC) and detrusor overactivity (DO), in comparison to children with normal urodynamic findings. Methods: We evaluated 586 children admitted for bedwetting, all of whom received urotherapy and/or pharmacotherapy. Persistent enuresis, lasting for over one year, was identified in 134 patients who were subsequently re-evaluated for occult neurological conditions and recommended for urodynamic studies (UDS). In total, 92 patients provided informed consent and underwent UDS. Of these, 40 patients were divided into two cohorts based on UDS findings. All patients were over 6 years of age and had normal physical examinations. The first cohort consisted of 23 children RBC and DO, while the second cohort included 17 children with normal UDS findings. All participants underwent spinal cord MRI with a 3 Tesla scanner. Urodynamic and MRI results were compared using Fisher’s chi-square test. Results: The median age of the cohort was 11 years, with 26 (65%) of the patients being female. Spinal disorders were identified in 10 patients (25%), with 8 cases of spina bifida without neurological compression and 2 cases of tethered cord. In the RBC + DO cohort, 7 out of 23 patients (30.4%) were found to have spinal disorders, compared to 3 out of 17 patients (17.6%) in the normal UDS cohort, with no statistically significant difference between the groups (p > 0.05). Conclusion: When evaluating persistent enuresis nocturna, a combination of RBC and DO in children with nocturnal enuresis and daytime symptoms may warrant spinal cord MRI, though with limited cost-effectiveness
Sınıf İçi Takım Liderliği Algısının Makine Öğrenimi Yöntemleriyle Modellenmesi: Türkiye’de Önlisans ve Lisans Öğrencileri Üzerine Bir İnceleme
No full textKadının Boşanma Talebinin Sebepleri İslam Hukuku Açısından Güncel Bir İnceleme (Kocaeli Örneği)
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SANAL GERÇEKLİK (VR) YÖNTEMİYLE İÇ MEKAN TASARIM STÜDYOLARINDA ÖĞRENCİLERİN RENK TERCİHLERİNİN BELİRLENMESİ
No full textGaN-FET Tabanlı LLC Rezonans DA-DA Dönüştürücü Analizi ve Tasarımı
No full textGelişen teknolojiyle birlikte güç elektroniğiuygulamalarında yüksek frekanslarda çalışma ihtiyacı artmıştır. Bu ihtiyacıkarşılamak için verimli yarıiletkenlere olan talep yükselmiştir. GaN tabanlıyarıiletkenler hem yüksek frekanslarda çalışma kapasitesi hem de elektrikselperformans açısından avantajlar sunmaktadır. Bu yarıiletkenlerin LLC rezonansdoğru akım-doğru akım (DA-DA) dönüştürücülerde kullanılmasıyla yüksek enerjiyoğunluğu bir dönüştürücü olmasına katkıda bulnmaktadır. LLC reonansdönüştürücü devresi temel olarak elektriksel izolasyon, yumuşak anahtarlamayapabilen ve artan ürün güvenliği, düşük EMI ve harmonik kirlilik, azaltılmışürün ağırlığı ve yüksek verimliliğe katkıda bulunur. Bu avantajları nedeniyle,LLC rezonans dönüştürücülere dayalı uygulamalar, elektrikli araç şarjistasyonu, dizüstü bilgisayar adaptörü, LCD TV güç kaynağı, LED aydınlatmasürücüsü, pil şarj cihazı ve fotovoltaik sistem dahil olmak üzere on yılı aşkınbir süredir hızla gelişmektedir.With the developing technology, the needfor high frequency operation in power electronics applications has increased.The demand for efficient semiconductors has increased to meet this need.GaN-based semiconductors offer advantages in terms of both high frequencyoperating capacity and electrical performance. The use of these semiconductorsin LLC resonant direct current-direct current (DC-DC) converters contributes toa high energy density converter. The LLC resonant converter circuit mainlycontributes to electrical isolation, soft switching and increased productsafety, low EMI and harmonic pollution, reduced product weight and highefficiency. Due to these advantages, applications based on LLC resonantconverters have been developing rapidly for over a decade, including electricvehicle charging stations, laptop adapters, LCD TV power supplies, LED lightingdrivers, battery chargers and photovoltaic systems. </p
Generalized trapezoid inequality for multiplicatively convex functions
No full textIn this paper, we first prove a new identity for multiplicative differentiable functions. Based on this identity, we establish a generalized trapezoid inequality for multiplicatively convex functions. Applications to special means are also given