Testicular fibrous hamartoma: A case report

Fibrous hamartoma (FH) of childhood is uncommon benign tumor. They are generally seen in the head and neck region, gastrointestinal system and lung. As in the case we report, they may also occur in other unusual sites such as groin and testis. The clinical presentation is almost always a mass or swelling. We hereby report a case with FH in atrophic testis which is unusual location and clinical presentation

Tuning of 2D rod-type photonic crystal cavity for optical modulation and impact sensing

We propose a novel way of mechanical perturbation of photonic crystal cavities for on-chip applications. We utilize the equivalence of the 2D photonic crystals with perfect electric conductor (PEC) boundary conditions to the infinite height 3D counterparts for rod type photonic crystals. Designed structures are sandwiched with PEC boundaries above and below and the perturbation of the cavity structures is demonstrated by changing the height of PEC boundary. Once a defect filled with air is introduced, the metallic boundary conditions is disturbed and the effective mode permittivity changes leading to a tuned optical properties of the structures. Devices utilizing this perturbation are designed for telecom wavelengths and PEC boundaries are replaced by gold plates during implementation. For 10 nm gold plate displacement, two different cavity structures showed a 21.5 nm and 26 nm shift in the resonant wavelength. Optical modulation with a 1.3 MHz maximum modulation frequency with a maximum power consumption of 36.81 nW and impact sensing with 20 μs response time (much faster compared to the commercially available ones) are shown to be possible

Intraspinal Anomalies in Individuals with Scheuermann’s Kyphosis: Is the Routine Use of Magnetic Resonance Imaging Necessary for Preoperative Evaluation?

Study Design Retrospective study. Purpose This study aimed to determine the incidence of intraspinal pathologies (ISPs) in individuals with Scheuermann’s kyphosis (SK) and to validate whether the routine use of magnetic resonance imaging (MRI) is necessary for preoperative evaluation. Overview of Literature There are several studies on the necessity of routine MRI screening and prevalence of ISPs related to different types of scoliosis have been conducted. However, despite the well-established association between ISPs and a higher risk for neurological complications there is no any study on the scientific literature concerning the prevalence of ISPs in patients with SK has been conducted. Methods The database of the institution was retrospectively reviewed to identify all patients diagnosed with SK who underwent surgery between 2012 and 2015. Patients were excluded from the study if their hospital database records did not include spinal images, which are routinely collected before surgery. The presence or absence of ISPs, as indicated on magnetic resonance images, was evaluated by a radiologist. Results Of the 138 potential participants, 120 were included in the study. Of these, seven patients (5.8%) had ISPs, and all the cases involved syringomyelia. None of the seven patients with ISPs required additional neurosurgical procedures before corrective surgery. No complications were reported during the perioperative period, and none of the patients developed postoperative neurological deficits. Conclusions According to this study, the incidence rate of ISPs in patients with SK was 5.8%, and we recommend that all patients with SK should be evaluated using MRI of the spine before corrective surgery

Heart Attack Analysis Detection System Using Machine Learning Methods

In order to investigate Heart Attack Analysis and Detection Using Machine Learning Methods, models that predict the type of news in a new condition determined by using Machine Learning Models have been studied. In particular, the performance of various classifiers, including logistic regression, Knearest neighbour (KNN), support vector machine (SVM), Naive Bayes and decision tree, is compared. In the experiments using a real-life dataset, logistic regression and SVM gave the best results with a test accuracy of 90%. Naive Bayes achieved an accuracy of 86.67%, KNN 83.33% and decision tree 63.33%. These results suggest that logistic regression and SVM can be suitable and effective machine learning models for predicting heart attack risk

Effect of the concrete cover to cracking of HPC with carbon reinforcement under uniaxial tensile load

Diese Arbeit setzt sich mit den Verbundeigenschaften von Textilbeton, eines innovativen Verbundwerkstoffes, auseinander. Textilbewehrung aus Hochleistungsfasern ermöglicht aufgrund ihrer Korrosionsbeständigkeit, der hohen Festigkeit und der geringen Wichte den Bau von schlankeren Bauteilen als dies mit gewöhnlichem Baustahl der Fall wäre. In zahlreichen Untersuchungen am Institut für Tragkonstruktionen der TU Wien wurde ein Abspalten der Betondeckung zufolge hoher Verbundbeanspruchungen beobachtet. Diese Spaltrissbildung in der Ebene der Textilien unter Berücksichtigung der Verbundparameter wird in der Dissertationsarbeit von Preinstorfer mithilfe eines numerischen Modells und experimentellen Untersuchungen detailliert erläutert. In der Literatur wird zudem berichtet, dass das Auftreten von Spaltrissen bei größerer Betondeckung höher ist im Vergleich zu kleinerer Betondeckung. Im Zuge dieser Arbeit wurden deshalb experimentelle Untersuchungen durchgeführt, wobei die Rissverhalten bei unterschiedlichen Betonüberdeckungen miteinander verglichen wurden, um auf eine optimale Betonüberdeckung schließen zu können. Zur Ermöglichung des Vergleichs wurden einige Randbedingungen wie Betongüte und Textilart jeweils fix gewählt. Es wurden mehrere Serien mit mattenförmigen Carbonbewehrungen mit veränderlichen Querschnittsflächen genutzt. Zudem wurde je Textilserie eine weitere Versuchsserie mit zusätzlicher Sandbeschichtung verwendet, wobei untersucht wurde, ob die zusätzliche Besandung einen Einfluss auf die Spaltrissbildung hat. Als Betongüte wurde durchgehend ein Hochleistungsbeton (HPC) gewählt, um ein möglichst gutes Verbundverhalten zu gewährleisten.Die experimentellen Untersuchungen wurden mittels eines uniaxialen Zugversuches durchgeführt, wobei durch die abgeschlossene Rissbildung im Zustand II auf die fundamentalen Verbundmaterialeigenschaften geschlossen werden kann. Dadurch lassen sich die Einflussparameter auf das Verbundverhalten, z. B. die Beschichtung der Textilien und die Größe der Betonüberdeckung, detailliert untersuchen.This thesis deals with the properties of the textile reinforced concrete, an innovative composite material. Textile reinforcement made from high-performance fibers enables, due to its resistance to corrosion, high strength and low weight, slimmer structural elements than a regular steel rebar. After numerous investigations at the Institute for reinforced concrete of the TU Vienna, the splitting of the concrete cover was observed due to the high bonding loads. This crack formation in the plane of the textiles, taking the composite parameters into account, is explained in detail in Preinstorfer’s dissertation using a numer-ical model and also an experimental investigation.According to the literature, the occurrence of the cracks is higher with the thick concrete cover compared to the thin concrete cover. In the course of this work, due to this behavior experimental investigations were carried out, where the crack behavior of different concrete coverings was compared with each other and optimized. For a meaningful comparison, some boundary conditions such as the concrete class and the type of the textile have been preselected. Several series with matshaped carbon reinforcements with variable crosssections were used. As a variant, further test series with an additional sand coating were used for each textile series in order to determine whether the additional sand coating had an impact on the crack formation. High performance Concrete (HPC) was chosen as the concrete class in order to achieve the best possible bonding behavior between the two materials.The experimental investigations were carried out by means of a uniaxial tensile test, where conclusions can be drawn about the fundamental composite material properties due to the completed crack formation after reaching the II. State. This allows the parame-ters influencing the bond behavior, such as the coating of the textiles and the thickness of the concrete cover, to be examined in detail.18

Effect Of Photoperiod On Plasma Thyroxine Hormone Level Of Mirror Carp (Cyprinus Carpio) Raised At A Low Water Temperature In A Controlled Environment

The objective of this study was to examine the effects of various lighting regimes on the plasma thyroxin hormone (T4) level of mirror carp (Cyprinus carpio). The carp were kept at the low tem- perature of 9°C to eliminate any influence of water temperature on feed intake, growth, and the hormone level. Treatments were 8 h light:16 h dark, 12 h light:12 h dark, and 16 h light:8 h dark. Plasma thyroxin levels were measured every four weeks for 12 weeks. The levels were signifi- cantly higher (p<0.05) in the groups exposed to 8 or 12 h light than in the group exposed to 16 h. The T4 levels significantly dropped with time in all photoperiods

Testicular fibrous hamartoma: A case report

Fibrous hamartoma (FH) of childhood is uncommon benign tumor. They are generally seen in the head and neck region, gastrointestinal system and lung. As in the case we report, they may also occur in other unusual sites such as groin and testis. The clinical presentation is almost always a mass or swelling. We hereby report a case with FH in atrophic testis which is unusual location and clinical presentationFibrous hamartoma (FH) of childhood is uncommon benign tumor. They are generally seen in the head and neck region, gastrointestinal system and lung. As in the case we report, they may also occur in other unusual sites such as groin and testis. The clinical presentation is almost always a mass or swelling. We hereby report a case with FH in atrophic testis which is unusual location and clinical presentatio

Ganglioneuroma of the neck: A case report

Objectives: An unusual left parapharyngeal ganglioneuroma case was discussed in the context of diagnostic difficulties, surgical tricks and Horner syndrome as a main surgical complication.Methods: The patient presented with a painless neck mass. Fine needle aspiration did not give any clue regarding diagnosis. The mass was removed totally by a challenging surgery.&nbsp;Results: Histopathology revealed ganglioneuroma. Horner syndrome occurred after surgery.Conclusion: Due to the scarcity of ganglioneuromas and the lack of specific signs and symptoms, it is often difficult to reach a definitive diagnosis prior to pathological examination. Ganglioneuromas should be considered in differential diagnosis of cervical neck masses located medial to main neurovascular structures. The patients should be warned of the possible complication of Horner syndrome.</p