Scattering Delay Network Simulator of Coupled Volume Acoustics

IEEEArtificial reverberators provide a computationally viable alternative to full-scale room acoustics simulation methods for deployment in interactive, immersive systems. Scattering delay network (SDN) is an artificial reverberator that allows direct parametric control over the geometry of a simulated cuboid enclosure as well as the directional characteristics of the simulated sound sources and microphones. This paper extends the concept of SDN reverberators to multiple enclosures coupled via an aperture. The extension allows independent control of the acoustical properties of the coupled enclosures and the size of the connecting aperture. The transfer function of the coupled-volume SDN system is derived. The effectiveness of the proposed method is evaluated in terms of rendered energy decay curves in comparison to full-scale ray-tracing models and scale model measurements

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Abstract Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

Case Report of a Man With Sertoli Cell Only, Transverse Testicular Ectopia, and External Auditory Canal Atresia

Transverse testicular ectopia (TTE) is an uncommon congenital anomaly, reported mostly as pediatric case reports. Herewith we report a 43-year old man presenting with sertoli cell only, Transverse testicular ectopia and external auditory canal atresia

A Transitional Cell Tumor of the Bladder in a Young Adult: A Case Report and Review of the Literature

Bladder tumors are rarely seen in young people under the age of 40. Its development after the exposure to industrial carcinogens for many years suggests that the environmental factors play a significant role in the development of transitional cell carcinoma of the bladder. The low prevalence of transitional cell carcinoma of the bladder in young people supports the existence of genetic component. Herewith, we present an 18-year-old patient without a history of exposure to any chemical agent and a review of the relevant literature

Magnetic actuation of nanofluids with ferromagnetic particles

Electromagnetically actuated microflows are generated by using ferromagnetic nanofluids containing Fe2O3 based nanoparticles. Because of their magnetic properties these nanoparticles are able to response to a magnetic field imposed along a microchannel so that a microflow could be driven. Nanofluid samples were located inside a minichannel and were directed with a magnetic field, which was induced by a solenoid wrapped around the minichannel, to drive the flow inside the minichannel, where its flow rate was also recorded. The flow rate was measured as a function of the imposed magnetic field. The corresponding pressure drop to deliver the same flow rate with an ordinary pump along the same minichannel was estimated so that the potential of this system for acting as a micropump in microfluidic applications was revealed

FARKLI ÖZELLİKLERDE BETON KARIŞIMLARININ DONATI KOROZYONUNU ÖNLEMEDEKİ ETKİNLİKLERİNİN GERÇEK DENİZ ORTAMINDA İNCELENMESİ

Donatı korozyonu betonarme elemanlar açısından tüm dünyada en önemli kalıcılık(durabilite) problemlerinden biridir. Deniz ortamı ise korozyonun gelişimi açısından enagresif çevresel etki kabul edilmektedir. Korozyon gelişiminde, beton türü ve sınıfı,örneğin çatlak durumu, inhibitör, mineral katkı kullanımı gibi birçok parametreninetkininin inceleneceği kapsamlı bir TÜBİTAK projesi halen yürütülmektedir. Buçalışmada, farklı çatlak koşullarına sahip C30, C60, LC30 ve LC60 beton numunelerinegömülü donatının korozyon gelişimine (gerçek deniz ortamında ve ıslanma-kurumaçevrimleri altında) uçucu kül, polipropilen lif ve inhibitör katkısının etkileriincelenecektir. Çalışma sonuçlarından bir kısmı bu bildiri de tartışılacaktır. Ön deneyselçalışmaların yapıldığı Dokuz Eylül Üniversitesi Yapı Malzemesi Laboratuvarında 16farklı karışımın tasarımları yapılmış, karışımların 90 gün su kürü sonrasındaki mekaniközellikleri ve bazı fiziksel özellikleri belirlenmiştir. Numuneler, gerçek deniz suyunda&nbsp;ıslanma kuruma etkisine tabi tutulmak için Rodaport limanında bulunan Bursa BetonAŞ’ye ait platforma yerleştirilmiştir. Bu bildiri kapsamında geliştirilen bazı karışımların(normal beton, hafif beton, yüksek performanslı beton ve yüksek performanslı hafifbeton) fiziksel ve mekanik özellikleri tartışılacaktır. Reinforcement corrosion is one of the most important durability issues in reinforcedconcrete elements all over the world. The marine environment is considered the mostaggressive environmental effect in terms of the development of corrosion. Acomprehensive TÜBİTAK project is currently underway to examine the effects of manyparameters such as concrete type and class, crack status, and inhibitor or mineral additiveusage on corrosion development. In this project, the effects of using fly ash,polypropylene fiber and inhibitor additives on the corrosion development (under wettingdrying cycles in real marine environment) of reinforcement embedded in C30, C60, LC30and LC60 concrete specimens having different crack conditions will be examined. Someof the results are discussed in this paper. In Construction Materials Laboratory of DokuzEylul University, where preliminary experimental studies were carried out, 16 differentmixtures were designed, and the mechanical properties and some physical properties ofthe mixtures after 90-day water curing were determined. The specimens will be placedon the platform belonging to Bursa Beton AŞ in the Rodaport port to be subjected to thewetting-drying effect in real sea water. The physical and mechanical properties of somemixtures (normal concrete, lightweight concrete, high performance concrete and highperformance lightweight concrete) developed within the scope of this paper will bediscussed.</p