An expandable armrest of a wheel chair includes a fixed part having a first pivotal portion which includes a first pivotal hole. VoiceXML reusable dialog components can be used for building a voice interface for use with multi-modal, multi-channel and conversational applications that offer universal access to information anytime, from any location, using any pervasive computing device regardless of its IO modality. The x-ray spectrum shows a blend of diffraction peaks, having peaks that have previously been distinctly present only collectively among various crystalline forms of titanyl oxyphthalocyanine, but can now be provided in a single crystalline form. This compound does not exhibit any side effect on the cardiovascular system even when the compound is administered in an effective amount for exhibiting a cartilage regeneration activity, and is therefore extremely useful as a safe and effective preventive andor therapeutic agent for cartilage disorders. The generated parameters are then transmitted to another device for use in generating prediction maps andor distribution to other devices.