Oxidized or degraded oil sands exhibit poor processability which is often not correlated with the fines or clay contents in the ore. Chemical markers (such as low pH and high soluble iron and calcium) for oil sands oxidation are sometimes not present even though significant changes in bitumen properties may have been successfully quantified using microscopic techniques developed at CANMET. More recently, an on-line tool using near infrared (NIR) spectroscopy, which correlates with the CANMET microscopic method, has been developed with Suncor Energy Inc. An on-line technique based on NIR that can quantify the amount of degrading ore coming to the extraction plant from Suncor Energy Inc.'s Steepbank mine will be useful in effectively controlling additions of process aids for treatment oxidizing or degraded ores.This paper discusses the processability of oxidized or degraded ores along with a microscopic method for identifying oxidized ore and its correlation with the NIR spectroscopic technique.

In this paper, we present a new parallel computation model for realistic rendering and 3D simulation applications. Our major goal is to minimize the programmer's work in order to develop, to obtain and to maintain maximal efficiency of this parallel application. To present the framework of our work, we describe the applications we aim at and we explain why object-oriented programming and SPMD (Simple Program Multiple Data i.e. all the processors run the same code in an asynchronous way on different data.) seem to be well suited to the hardware target platform. Then, after a short survey of some existent approaches, we detail our proposition, based on a data distribution facility set offered through a general SPMD programming structure. First, we show how a classical object-oriented language improved by some special concurrent aggregate classes can be sufficient. Then we study how some techniques of virtual communication can efficiently les us manage these features. We end with a discussion as regards implementation problems on our present simulator running on a T800 Transputer network and for the design on a future T9000 Transputer machine.

We first explain our motivations to develop parallel architectures and software for realistic rendering and simulation applications. Then, after a brief summary of the results obtained with a previous prototype on a Transputer network with a classical programming approach (whose aim is to clearly explain the existing problems for the classical critical aspects of load balancing, deadlock, etc.), we explain why and how an object-oriented approach associated with an SPMD (single process, multiple data) programming model and its implementation appears to be well suited and more efficient. This demonstration is made on both sides of the problem: the data distribution and the communication model

In this paper, we present an animation method based on a dynamic management of the scene. These works have been developed within the framework of the VOXAR (VOXel ARchitecture) project which initial purpose was to build a real time parallel machine to compute image synthesis by the ray-tracing method. We describe the space repartition on the hardware topology by rolling up the space around the processor network. We explain the data connexity needed for ray tracing. Then, we present the capabilities of handling object using the same partition of space. This approach allows us to compute animation of complex scene without prohibitive time in front of rendering time. We show the animation kernel and the automatic mechanism used to control motions and variations of the components (objects, lights, camera) in a 3D scene.

The aim of the VOXAR (VOXel ARchitecture) [VOX∗] project is to step towards a real time ray-tracing machine. We divide the space into Voxels and the parallelism exploited is the natural parallelism between independent space locations that are voxels. Objects are projected into the voxel matrix and rays cross the scene Voxel by Voxel with an incremental integer logic algorithm.

AbstractEs wird die Thermolyse z.B. der Epoxide (I) untersucht, wobei die Reaktion von (Ib) in Gegenwart von 4,4′‐Dimethoxy‐thiobenzophenon und die von (Ic) in Gegenwart von Benzaldehyd durchgeführt wird.

The thermolysis of α-cyano α-keto epoxides to give dioxoles is a new rearrangement. The reactivity of the epoxides is dependent upon the nature of the substituents on the epoxide ring, and solvent polarity. When the reaction is carried in the presence of benzaldehyde, a 1,3 cycloadduct is obtained. These results are in good agreement with a carbonyl ylide intermediate.

La thermolyse des α-cyano α-céto époxydes en dioxoles constitue un nouveau rearrangement des α-céto époxydes. La plus ou moins grande réactivité des époxydes étudiés est liée à la nature des substituants de l'époxyde et à la polarité du milieu réactionnel. Lorsque la réaction est réalisée en présence du benzaldéhyde, on isole, à côté du dioxole, le produit de cycloaddition dipolaire 1,3. Ces résultats permettent de retenir un mécanisme de réaction faisant intervenir un ylure de carbonyle intermédiaire.

Chemischer InformationsdienstVolume 3, Issue 26 Heterocyclic Compounds ChemInform Abstract: THERMISCHE UMLAGERUNGEN EINIGER ALPHA-AROYL-EPOXIDE IN DIOXOLE A. ROBERT, A. ROBERTSearch for more papers by this authorB. MOISAN, B. MOISANSearch for more papers by this author A. ROBERT, A. ROBERTSearch for more papers by this authorB. MOISAN, B. MOISANSearch for more papers by this author First published: June 27, 1972 https://doi.org/10.1002/chin.197226291Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume3, Issue26June 27, 1972 RelatedInformation

A. Robert and B. Moisan, J. Chem. Soc., Chem. Commun., 1972, 337 DOI: 10.1039/C39720000337