NextMed, Augmented and Virtual Reality platform for 3D medical imaging visualization

The visualization of the radiological results with more advanced techniques than the current ones, such as Augmented Reality and Virtual Reality technologies, represent a great advance for medical professionals, by eliminating their imagination capacity as an indispensable requirement for the understanding of medical images. The problem is that for its application it is necessary to segment the anatomical areas of interest, and this currently involves the intervention of the human being. The Nextmed project is presented as a complete solution that includes DICOM images import, automatic segmentation of certain anatomical structures, 3D mesh generation of the segmented area, visualization engine with Augmented Reality and Virtual Reality, all thanks to different software platforms that have been implemented and detailed, including results obtained from real patients. We will focus on the visualization platform using both Augmented and Virtual Reality technologies to allow medical professionals to work with 3d model representation of medical images in a different way taking advantage of new technologies

Real-time 3D analysis during electron tomography using tomviz

The demand for high-throughput electron tomography is rapidly increasing in biological and material sciences. However, this 3D imaging technique is computationally bottlenecked by alignment and reconstruction which runs from hours to days. We demonstrate real-time tomography with dynamic 3D tomographic visualization to enable rapid interpretation of specimen structure immediately as data is collected on an electron microscope. Using geometrically complex chiral nanoparticles, we show volumetric interpretation can begin in less than 10 minutes and a high quality tomogram is available within 30 minutes. Real time tomography is integrated into tomviz, an open source and cross platform 3D analysis tool that contains intuitive graphical user interfaces (GUI) to enable any scientist to characterize biological and material structure in 3D

Sfalerit konsantrelerinden oksitleyici basınç liçi ile çinko kazanımı

TÜBİTAK MİSAG Proje01.08.1995Bu çalışmada,yaklaşık % 50 çinko içeren Çayeli -çinko sülfür konsantresine oksitleyici basınç liçi veya Sherritt Gordon prosesinin uygulanabilirliği araştırılmıştır. Çayeli çinko sülfür konsantresinin ayrıntılı olarak karakterizasyonundan sonra titanyum otoklavda oksijen basıncı altında liç deneyleri gerçekleştirilmiştir. Sıcaklık (120-160 °C), süre (60-180 dakika), oksijen kısmi basıncı (200-1000 kPa), sülfürik asit konsantrasyonu ( 145-205 gpl) ve yüzey-aktif reaktif oranı (lignosülfanat / quebracho =1/3 -3/1) incelenen liç değişkenleridir. Değişkenlerin düzeyleri, proses hakkında literatürden elde edilen bilgiler dikkate alınarak saptanmıştır. Deneyler, basınç liçi sisteminin kompleks olması dikkate alınarak liç değişkenlerinin çinko liç verimi üzerine etkisini ve bu değişkenlerin birbirleriyle olan etkileşimlerini saptayabilmek amacı ile istatistiki bir deney planına göre gerçekleştirilmiştir. Deneylerde elde edilen çinko liç verimi verileri istatistiki metodlar ile analiz edilmiş ve proses değişkenlerinin çinko verimi üzerindeki etkisini ifade eden ikinci dereceden bir regrasyon denklemi elde edilmiştir. Çalışılan değişken aralıklarında çinko liç verimini yaklaşık olarak veren bir polinom olan denklem, çalışılan değişkenler arasında etkileşim olduğunu göstermiştir. Bu, herhangi bir değişkenin çinko liç verimi üzerindeki etkisinin, etkileşim içinde olduğu diğer değişkenlerin düzeyine bağlı olduğunu göstermiştir. Her defasında tek bir değişkeni değiştirerek yapılan çalışmalar hiçbir zaman bu etkileşimleri ortaya çıkaramayacak ve değişkenlerin çinko liç verimi üzerindeki etkileri hakkında yanlış yorumlara yol açabilecek ve değişkenlerin düzeyi değiştirildiğinde tahmin yapmayı imkansız hale getirecektir. Bu çalışma, oksitleyici basınç liçi prosesinin Çayeli çinko sülfür konsantresine proses değişkenlerinin düzeylerine bağlı olarak % 99'u aşan çinko liç verimleri elde edilerek uygulanabileceğini ve istatistiki deney planı ve analizinin, bu çalışmada olduğu gibi, güvenilir sonuçlar elde etmede faydalı bir yaklaşım olduğunu göstermiştir

Tenova M&M A4 ad 8'12_Layout 1

Synopsis Drying, calcination, prereduction, and smelting are the main steps in conventional crude ferronickel production. Industrially, these steps are conducted using the rotary kiln-electric arc furnace (RKEF) process. In this paper, calcination characteristics of Sivrihisar laterite ores from the Central Anatolia region are investigated. The extent of elimination of chemically bound water and other volatiles was studied by experiments conducted at various temperatures in the 250-800°C range. Phase changes were examined using X-ray diffractometry. For the particle size used in the study, 300°C was determined to be almost sufficient for complete transformation of goethite to haematite, and 700°C was required for effective elimination of all volatiles in the ore

Investigation of effect of colemanite addition on copper losses in matte smelting slag

In this study, the aim was to reduce copper losses to slag in copper production by using a boron compound, called colemanite (2CaO center dot 3B(2)O(3)center dot 5H(2)O), as flux, besides silica. In order to achieve this purpose, two different matte-slag couples were used; the flash furnace matte-slag obtained from Eti Copper Inc. (EBI.) and a master matte-slag without copper produced synthetically under laboratory conditions. Chemical analyses of flash furnace slag and synthetic master slag were 0.88%Cu-36.1%SiO2-43.9%FeO-3.7%Fe2O3 and 37.6%SiO2-60.0%FeO-2.4%Fe2O3 respectively. In each experiment, the same amounts of slag and matte were mixed with the addition of predefined amounts of colemanite and melted together at 1250 degrees C for different durations under nitrogen atmosphere in a silica crucible. Results showed that it was possible to decrease the copper losses to about 0.3-0.4% by accelerating the settling rate of matte particles by the addition of colemanite, which was attained by the expected increase in flash furnace slag fluidity and lowering of its liquidus temperature

Leaching by ferric sulphate of raw and concentrated copper-zinc complex sulphide ores

A composite mixture of three typical Cu/Zn complex ores, namely black-, yellow- and altered-ore, from Cayeli deposit in Turkey, was used for leaching experiments under atmospheric pressure in ferric sulphate solutions, In order to study the reaction kinetics of the copper and zinc dissolution in the temperature range from 50 to 80-degrees-C; also in the presence of a solvent for elemental sulphur, such as CCl4. Owing to the fact that quite low copper extraction yields were obtained and to the clearly evident necessity of using pressure leaching in autoclave at higher temperatures, a tentative process of the ore enrichment by selective or bulk-flotation was then examined. Leaching tests in an autoclave at temperatures ranging from 100 to 230-degrees-C were carried out on the bulk-concentrate produced. Good extraction yields for both metals were achieved at 140-degrees-C after a few hours leaching by ferric sulphate