Mitsubishi

About: Mitsubishi is a company organization based out in Tokyo, Japan. It is known for research contribution in the topics: Signal & Layer (electronics). The organization has 53115 authors who have published 54821 publications receiving 870150 citations. The organization is also known as: Mitsubishi Group of Companies & Mitsubishi Companies.

Parallel data processing system combining a SIMD unit with a MIMD unit and sharing a common bus, memory, and system controller

Abstract: There are SIMD type parallel data processing systems having a single instruction stream and multiple data streams and MIMD type parallel data processing systems having multiple instruction and data streams in the parallel data processing field for performing high-speed data processing. They have both merits and demerits and each have their suitable application fields. Because of this, it is extremely difficult to cover a wide range of application fields with either one of the systems. Then, a SIMD type parallel processing unit (50) and a MIMD type parallel data processing unit (51) are connected to each other by a common bus (41) and a memory (42), and a system controller (43) is provided to allow each of the parallel data processing units to perform its suitable processings, thus making it possible to apply the optimum parallel processing system to a wide range of application fields. That is, simple processings of a large volume of data are allocated to the SIMD type parallel data processing unit, while complex processings of a small volume of data are allocated to the MIMD type parallel data processing unit, whereby processings which have been difficult for a conventional computer to accomplish within an effective time, such as large-scale and complex processings of images, can be performed within a practical time at a high speed.

Identification of expressed genes characterizing long-term survival in malignant glioma patients

Abstract: Better understanding of the underlying biology of malignant gliomas is critical for the development of early detection strategies and new therapeutics. This study aimed to define genes associated with survival. We investigated whether genes coupled with a class prediction model could be used to define subgroups of high-grade gliomas in a more objective manner than standard pathology. RNAs from 29 malignant gliomas were analysed using Agilent microarrays. We identified 21 genes whose expression was most strongly and consistently related to patient survival based on univariate proportional hazards models. In six out of 10 genes, changes in gene expression were validated by quantitative real-time PCR. After adjusting for clinical covariates based on a multivariate analysis, we finally obtained a statistical significance level for DDR1 (discoidin domain receptor family, member 1), DYRK3 (dual-specificity tyrosine-(Y)-phosphorylation-regulated kinase 3) and KSP37 (Ksp37 protein). In independent samples, it was confirmed that DDR1 protein expression was also correlated to the prognosis of glioma patients detected by immunohistochemical staining. Furthermore, we analysed the efficacy of the short interfering RNA (siRNA)-mediated inhibition of DDR1 mRNA synthesis in glioma cell lines. Cell proliferation and invasion were significantly suppressed by siRNA against DDR1. Thus, DDR1 can be a novel molecular target of therapy as well as an important predictive marker for survival in patients with glioma. Our method was effective at classifying high-grade gliomas objectively, and provided a more accurate predictor of prognosis than histological grading.

Exhaust emission control device of internal combustion engine

Abstract: PROBLEM TO BE SOLVED: To realize a more accurate grasping of a deterioration degree of a NOx catalyst. SOLUTION: In the device, it is presumed that a NOx occlusion amount of a NOx occlusion catalyst 18 becomes the maximum occlusion amount when a first NOx presumption amount presumed to be adsorbed to the NOx occlusion catalyst 18 exceeds a judgment level and a second NOx presumption amount is presumed from a time required for a variation of an output level of an air- fuel ratio sensor 22 when the air-fuel ratio of a flowing-in exhaust gas to the NOx occlusion catalyst 18 is changed from a lean to a rich. A deterioration of the NOx occlusion catalyst 18 is judged by comparing the first NOx presumption amount and the second NOx presumption amount. When the time required for the variation of the output level of the airfuel ratio sensor 22, a rich degree is made small at the time of a rich operation and the time required for the variation of the output level of the air-fuel ratio sensor 22 is lengthened.

Exhaust emission control device of internal combustion engine

Abstract: An exhaust emission control device of an internal combustion engine, wherein an exhaust emission control valve (24) disposed in an exhaust pipe (22) of the internal combustion engine is approximately fully closed at the time of start and during the warming-up of the engine, the injection amount of a main fuel is increased over an optimum injection amount for fully opened exhaust emission control valve, and an auxiliary fuel is additionally injected during an expansion stroke, whereby unburned HC exhausted into the atmosphere at the start and during the warming-up of the engine is reduced remarkably.

Field-effect transistor with at least two different semiconductive organic channel compounds

Abstract: A field effect transistor has a channel between a source electrode and a drain electrode made from an organic semiconductor. In one form of the invention, the channel is a mixture of at least two different organic compounds. In another form of the invention, the channel is a lamination of at least two films of different organic compounds. The channel can also be a π-conjugated block copolymer of at least two different types of monomers.