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Nondestructive testing based on cooperative twin-robot technology is a significant issue for curved-surface inspection. To achieve this purpose, this paper aims to present a kinematic constraint relation method relative to two cooperative robots.

The transformation relation of the twin-robot base frame can be determined by driving the two robots for a series of handclasp operations on three points that are noncollinear in space. The transformation relation is used to solve the cooperative motion problem of the twin-robot system. Cooperative motions are divided into coupled and combined synchronous motions on the basis of the testing tasks. The position and orientation constraints for the two motion modes are also explored.

Representative experiments between two industrial robots are conducted to validate the theoretical developments in kinematic constraint analysis. Artificial defects are clearly visible in the C-scan results, thereby verifying the validity and the effectiveness of the proposed method.

The transformation relation of the twin-robot base frame is built under a series of handclasp operations. The position and orientation constraints for the coupled and combined synchronous motions are explored. Theoretical foundations of trajectory planning method for the transmitting and receiving transducers of the cooperative twin-robot system are presented.

Film provides an alternative medium for assessing our interpretations of cultural icons. This selective list looks at the film and video sources for information on and interpretations of the life of Woody Guthrie.

Within the past 20 years hiking and backpacking have enjoyed rapid growth among Americans as favorite outdoor activities. From 1965 to 1977 the number of hikers almost tripled, from 9.9 million to 28.1 million, while national forest visitor days among hikers and mountaineers increased from 4 million in 1966 to 11 million in 1979. Accompanying this growth in interest has been a boom in books about the sport. These include both “how‐to‐do‐it” volumes and guides to specific geographical areas. Each year brings another spate of books, yet to this compiler's knowledge no bibliography of hiking guides to the Rocky Mountains, one of North America's premier outdoor regions, has yet been attempted. This bibliography is an effort to correct that situation.

The Library Association of Ireland issued last month the first number of An Leabharlann, their new official journal. The title, for those of us who do not speak the language of Erin, means The Library. It is an extremely interesting venture which will be followed by librarians on the mainland with sympathetic curiosity. In particular our readers would be interested in the first of a series of articles by Father Stephen J. Brown, S.J., on Book Selection. The worthy Father lectures on this subject at University College, Dublin, in the Library School. It is mainly concerned with what should not be selected, and deals in vigorous fashion with the menace of much of current published stuff. No doubt Father Brown will follow with something more constructive. Mr. T. E. Gay, Chairman of the Association, discusses the need for a survey of Irish libraries and their resources. We agree that it is necessary. The Net Books Agreement, the Council, Notes from the Provinces, and an article in Erse—which we honestly believe that most of our Irish friends can read—and an excellent broadcast talk on the Library and the Student by Miss Christina Keogh, the accomplished Librarian of the Irish Central Library, make up a quite attractive first number. A list of broadcast talks given by members of the Association is included.

This paper both supports previous findings relating to, and presents new insights into: the information needs and the information seeking processes of a sample of informal caregivers of people with dementia (in relation to their own needs and the interrelated needs of the people they are caring for); the extent to which such information needs are and are not being met; and the factors facilitating and hindering access to the right information.

The study adopted a qualitative approach in the form of a thematic analysis of in-depth, semi-structured interviews with a sample of 20 informal caregivers from a range of different age groups, genders and caring roles.

Thematic analysis identified significant informational challenges, with a common perception that information seeking was onerous, requiring a proactive approach. Further challenges arose from a perceived lack of focus on carer needs coming up against the boundaries of professional knowledge and inconsistent information provision across the sample. Distance carers faced specific issues. A second theme of negative impacts described burdens arising from: difficulties in accessing information from a complex array of support services closure or change in services and unfulfilled information needs. Participants employed strategies to enable access to information, for example, being open about their caring role; and building formal or informal support networks. It is important to address emotional as well as cognitive dimensions of information needs.

This research highlights a need for health and social care, practice and policy to acknowledge and address information needs of this diverse population and build resilience. Above all, information seeking and sharing must be understood within the context of the emotional impact of caring, and recognition of these twin needs is crucial.

Whilst previous research has focussed on identifying specific needs and knowledge acquisition at cross-sections, a more holistic understanding of experiences is underexplored. This approach is needed to take into account broader contexts, diversity of experiences and different caring roles, e.g. primary and secondary carers, and in situ and distance carers.