Michiya Ohta

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Twenty-four cases of classical medulloblastoma and one case of desmoplastic medulloblastoma were examined for glial fibrillary acidic protein (GFAP) using the immunoperoxidase method to assess astrocytic differentiation. In 16 cases of classical medullablastoma GFAP-positive cells were present in variable numbers. These cells were classified as three(More)
The role of resistin in human biology remains uncertain. We measured serum resistin levels in Japanese patients with (n=111) and without (n=98) type 2 diabetes mellitus and investigated the significance of this hormone in the pathophysiology of diabetes. The levels of serum adiponectin and leptin were also measured. Resistin levels were increased(More)
Twenty-seven patients with juvenile nonprogressive muscular atrophy localized in the hand and forearm were analyzed. The clinical characteristics were juvenile male occurrence, insidious onset, specific distribution of localized muscular atrophy and a stationary course. On electromyography, denervation voltage (or giant NMU) is found in the atrophied(More)
The fine structure, histometric characteristics, and permeability of microvessels were studied by electron microscopy in normal and in ethylnitrosourea (ENU)-induced glioma tissue from rats, using horseradish peroxidase (HRP) as a tracer. The tumor vessels were classified into (1) capillary buds (Type I); (2) round small to large capillaries (Type II); (3)(More)
Aceruloplasminemia is an interesting disease, the study of which helps elucidate how iron-induced oxidative stress is involved in neuronal cell death. In order to study the neuropathological characteristics associated with oxidative stress, we scrutinized the brains of 5 patients with aceruloplasminemia histopathologically and immunohistochemically. The(More)
Augmented Reality (AR) is applied in different fields, such as entertainment, medicine, manufacturing and repair, and training. Due to the increase of interest in AR, simple frameworks for developing AR system are required. This paper proposes a photo-based AR system that uses photo images taken from different perspectives around an object. The proposed(More)
A many-wavelength packet is a packet simultaneously encoded over many-wavelengths occupying wide bandwidth, say, 1Tbps. Many-wavelength packets are switched and buffered with wide band devices, fully exploiting wide bandwidth of optics to achieve future packet-based, ultra-high speed transport networks. Optical packet switches with many-wavelength packets(More)
This paper proposes a novel peak-to-average power ratio (PAPR) reduction method for OFDM signals. The novelty of the method is the use of Hopfield type neural network (NN) with tone injection (TI) scheme to reduce PAPR. The proposed NN is suitable for global search and PAPR is sufficiently reduced, and side information of parameters for PAPR reduction(More)