abstract this paper by reviewing the main examples of small to medium-scale retractable roof structures covering building courtyards is to present an innovative rigid retractable roof system employing spatial frames for a courtyard of an existing building in tabriz islamic art university. the courtyard is currently used for temporary exhibitions and gatherings whenever permitted by environmenta...

A lytic factor, associated with the cell wall, was fortuitously discovered during the course of the investigations described in the previous paper (1). In the pneumococcal transformation system (2-5) as well as in the Bacillus subtilis transformation system (6), the highly transformable strains possessed active autolytic enzymes. Consequently, studies were undertaken to investigate the relation...

A lytic factor, associated with the cell wall, was fortuitously discovered during the course of the investigations described in the previous paper (1). In the pneumococcal transformation system (2-5) as well as in the Bacillus subtilis transformation system (6), the highly transformable strains possessed active autolytic enzymes. Consequently, studies were undertaken to investigate the relation...

A transformable wheel designed in this study is proposed to meet the increasingly complex travel requirements of people because it urgent provide a smooth and barrier-free scheme changeable urban land. The wheel, with 10 pivoting-head parts, allows vehicles wheels surmount low-height obstacles that deliberately complicates terrain such as blind roads, small steps, bumps door sills, achieve low-...

The species Campylobacter jejuni is considered naturally competent for DNA uptake and displays strong genetic diversity. Nevertheless, nonnaturally transformable strains and several relatively stable clonal lineages exist. In the present study, the molecular mechanism responsible for the nonnatural transformability of a subset of C. jejuni strains was investigated. Comparative genome hybridizat...

Flexibility is a concept associated with variable needs of human beings.Today transformable structures are used to meet human changeable demands with different purposes and functions such as facades, roofs, sunshades, etc.A Flexible structure must be able to change physically and adapt to predetermined conditions.To provide flexibility and adaptability,transformable systems are required to poss...

Transformable elements, objects, and architecture have long been used by people for various purposes. The analysis of the development transformable systems shows that it is impossible to design using simple static structures, need create new structures solved. This article discusses relationship between art, technology, technology in architecture, changing architectural objects systems, quality...