Search results

The purpose of this study aims to simulate the long-period fiber grating sensor pulse peak position against the transmission range. The long-period fiber grating sensor pulse peak position against the transmission range is simulated clearly where the pulse peak value at zero position is 0.972655 with the ripple factor of unity. It is demonstrated that the long-period fiber grating sensor bandwidth can be estimated to be 50 µm. Wavelength shift of the long-period grating sensor (LPGS) is reported against grating wavelength, applied temperatures and applied micro strain.

This work has reported the numerical simulation of LPGS transmission spectrum behavior characteristics under the strain and temperature effects by using OptiGrating simulation software. The sensor fabrication material is silica-doped germanium. The transmittivity/reflectivity and input spectrum pulse intensity of long-period Bragg sensor variations are simulated against the grating wavelength variations. Input/output pulse intensity of LPGS variations is simulated against the timespan variations with the Gaussian input pulse from 100 to 500 km link length.

Temperature variation and strain variation of the LPGS are outlined against both applied temperatures and micro-strain variations at the central grating wavelength of 1,550 nm.

It is demonstrated that the long period fiber grating sensor bandwidth can be estimated to be 50 µm. Wavelength shift of the long period grating sensor is reported against both grating wavelength, applied temperatures and applied micro strain. Temperature variation and strain variation of the long period grating sensor are outlined against both applied temperatures and micro strain variations at the central grating wavelength of 1550 nm.

SOME amount of loss by enemy action has occurred in libraries since our last writing, but none of it has been on such a scale as we had to record earlier. This may be due to the more restricted raiding of the winter months, and, as we have so often remarked, is no assurance that more and great damage may not be endured—for it will be endured—when the boasted offensive takes place. It is gratifying to know that readers in heavily bombed areas continue faithful to libraries. Books have taken an even higher place lately, and if in these areas the circulation figures are smaller, it is because the populations are smaller. Individual readers use more books than ever.

It was only after considerable pressure had been brought to bear by the various health authorities of the country that the Government, in July, 1899, appointed a Departmental Committee to consider the subject of the use of preservatives and colouring matters in food, and it is now some months ago that the full report of the Committee was published, containing certain recommendations of the utmost importance for the consideration of the authorities. Up to the present time nothing further has been heard of the matter, and in answer to a question recently put to the President of the Local Government Board by the Mayor of Kensington, Sir SEYMOUR KING, as to whether the Board intends to take steps by the introduction of a Bill, or otherwise, for giving effect at an early date to the recommendations contained in the report of the Committee, the President stated that the report was “still under consideration,” and that he could make no statement at present as to the course which the Government would take.

THIS issue opens the new volume of THE LIBRARY WORLD and it is natural that we should pause to glance at the long road we have travelled. For over forty years our pages have been open to the most progressive and practical facts, theories and methods of librarianship; our contributors have included almost every librarian who has held an important office; and we have always welcomed the work of younger, untried men who seemed to have promise— many of whom have indeed fulfilled it. In the strain and stress of the First World War we maintained interest and forwarded the revisions in library methods which adapted them to the after‐war order. Today we have similar, even severer, problems before us, and we hope to repeat the service we were then able to give. In this we trust that librarians, who have always regarded THE LIBRARY WORLD with affection, will continue to support us and be not tempted because of temporary stringency, to make a victim of a journal which has given so long and so independent a service.

IT is very appropriate that this number of THE LIBRARY WORLD should be devoted to the subject of cataloguing. This has become current in a special degree owing to the activity of the A.L.A. and the L.A. committees on both sides of the Atlantic, who are engaged in reviewing the Anglo‐American Code of Cataloguing Rules. Cataloguing is a subject that figures more in the minds of candidates for examinations than it does in the average conversations of librarians, but there is no more important subject in the librarian's life and no more significant activity. Our readers may not accept the implications of the somewhat vigorous “Letters on Our Affairs” which appear in this number, but it could be urged that there are many things to consider in cataloguing which have immediate importance. The matter was a simple one in former days. Forty years ago every library in this country of any size found it possible to issue a printed catalogue of some sort or other. The objections to these printed catalogues are commonplace to‐day; they were expensive, their cost was not recovered by sales, and they were incomplete from the beginning. The point is that libraries somehow managed to publish them, and those libraries were, as our correspondent suggests, of as good service to literature in its best sense as are present libraries.

Undergraduates are highly susceptible to the development of mental health difficulties. Afro-Caribbean students are particularly vulnerable to the pressures of university yet are less likely than other ethnic groups to receive early intervention. This paper aims to understand the barriers and facilitators that Afro-Caribbean undergraduates perceive towards accessing mental health services in the UK.

Critical Incident Technique was used as the qualitative method because it explores the critical factors that contribute to or detract from a specific experience. Seventeen Afro-Caribbean undergraduates participated in five focus groups. This involved engaging in a novel psychosocial activity that incorporated vignettes to encourage the identification of barriers and facilitators to service access. The data were analysed thematically to generate categories of critical incidents and wish-list items.

Analysis revealed rich data from a sub-group rarely researched within UK literature. Fifteen barriers, eleven facilitators and five wish-list items were identified. The importance of mental health literacy, social networks, cultural sensitivity and concerns surrounding services underpinned many categories.

Findings provide a new perspective on barriers reported in previous literature. Novel facilitators were highlighted where, although psychological and sociocultural factors were deemed valuable, structural changes were most desired. Recommended changes illustrate innovative interventions that could make services accessible for young adult Afro-Caribbean populations. Future research should explore the barriers and facilitators identified by Afro-Caribbean undergraduates across various universities who have successfully accessed and engaged with services. This could provide a holistic perspective on viable facilitators enabling access despite the presence of barriers.