Timber: Its Identification and Mechanical Properties

1918 ◽  
Vol 22 (89) ◽  
pp. 134-152
Author(s):  
W. H. Barling

In this paper I propose to bring before you a broad outline of our knowledge of the subject, not from the point of view of a botanist, but purely from the point of view of an engineer.Although in ancient, and in fact during all time, timber has been extensively used for constructional purposes, our knowledge of it is comparatively small, whilst the subject itself is very extensive.The reason for these facts is not hard to find. Unfortunately the physicist has not in general had to deal with timber in the progress of physical research, as he has with metals; and the questions which concern the engineer are not in general those with which the botanist deals.There has been comparatively little incentive for engineers to do much work on timber, as before the advent of the aeroplane its application was limited to unimportant parts, except in America and the Colonies, where the cost of metal parts is high. A considerable amount of information has in recent years been published by the American Government Forestry Department; the Government of New South Wales, Australia, have also published a considerable amount of data on Australian timbers.

2020 ◽  
Vol 33 (3) ◽  
pp. 286-293
Author(s):  
Vanessa L. Scarf ◽  
Serena Yu ◽  
Rosalie Viney ◽  
Laura Lavis ◽  
Hannah Dahlen ◽  
...  

PEDIATRICS ◽  
1962 ◽  
Vol 30 (1) ◽  
pp. 157-158
Author(s):  
Carl C. Fischer

REGARDLESS of how we, as individual physicians, may feel about the role of the federal government in the individual practice of medicine, the time has long since passed when we can afford the luxury of ignoring it. In past years the influence of the government on medicine has been mostly in general areas and perhaps least of all in that of pediatrics; but under the present administration there has been a decided change. For this reason it seems necessary to me to call to the attention of all Fellows of the Academy the particular items in President Kennedy's message of February 26, 1962, which relate specifically to the practice of Pediatrics. These may be considered to be three in number: The first of these dealt with the subject of immunization. On this topic President Kennedy said: I am asking the American people to join in a nationwide vaccination program to stamp out these four diseases (whooping cough, diphtheria, tetanus, and poliomyelitis) encouraging all communities to immunize both children and adults, keep them immunized and plan for the routine immunization of children yet to be born. To assist the states and local communities in this effort over the next 3 years, I am proposing legislation authorizing a program of federal assistance. This program would cover the full cost of vaccines for all children under 5 years of age. It would also assist in meeting the cost of organizing the vaccination drives begun during this period, and the cost of extra personnel needed for certain special tasks.


Author(s):  
Anne Gray

Russell Drysdale was an Australian artist who created an original vision of the Australian landscape from the 1940s to the 1960s, portraying the emptiness and loneliness of the Australian outback and country townships in his paintings, drawings, and photographs. During World War II, he depicted everyday subjects, including groups of servicemen waiting at railway stations. He traveled numerous times to the interior of Australia, including a trip to record the drought devastation in South Western New South Wales in 1944, where he created images that convey the environmental degradation of the landscape. In 1947, he explored the Bathurst region with Donald Friend where he discovered Sofala and Hill End, an area that served as the subject matter for his art for a number of years. Drysdale painted many images of deserted country towns as well as brooding landscapes peopled with stockmen and station hands. In his paintings of Aborigines, Drysdale expressed a deep concern for the Indigenous people, often placing them within his paintings in a manner that conveys a sense of dispossession. His work was singled out by Kenneth Clark in 1949 as being among the most original in Australian art, and his exhibition at the Leicester Galleries, London, in 1950 convinced British critics that Australian artists had an original vision.


2012 ◽  
Vol 27 (6) ◽  
pp. 595-600 ◽  
Author(s):  
Sophie E. Tyner ◽  
Louise Hennessy ◽  
Lisa J. Coombs ◽  
Jan Fizzell

AbstractWorld Youth Day 2008 was held in Sydney, Australia in July 2008. New South Wales (NSW) Health, the government health provider in Australia's most populous state, worked with partner agencies to provide medical services via on-site medical units at key event venues.A post-event review of medical records from the on-site medical units indicated 465 patient presentations, comprised largely of infectious respiratory symptoms and general health concerns of a primary care nature. Providing on-site health services is considered an important risk-mitigation action for many mass gatherings, especially those that generate a substantial temporary population of participants and take place over a number of days.TynerSE,HennessyL,CoombsLJ,FizzellJ.Analysis of presentations to on-site medical units during World Youth Day 2008.Prehosp Disaster Med.2012;27(6):1-6.


2007 ◽  
Vol 19 (5) ◽  
pp. 974-984 ◽  
Author(s):  
C. Peisah ◽  
K. Wilhelm

Background: The growing and welcome interest in the issues leading to distress and impairment in younger doctors has not been mirrored by a focus on the similar issues in older doctors which is surprising given the aging medical workforce.Objectives: To improve understanding of impairment in older doctors and to facilitate the planning of primary prevention strategies.Method: Consecutive case records of notifications to the Impaired Registrants Program of the New South Wales Medical Board, Australia, of doctors over 60 years from January 2000 to January 2006 (N = 41) were examined. Details of demographics, type of practice, nature of referral, medical morbidity, cognitive examination, psychiatric diagnosis and outcome of assessment were recorded.Results: Impaired older doctors suffered cognitive impairment (54%), substance abuse (29%) and depression (22%) and 17% had two comorbid psychiatric conditions. Twelve percent had frank dementia. Two work patterns – the “workhorse” and the “dabbler” – were observed, as was a culture of postponed retirement due to a sense of obligation and working “until you drop.” Impaired older doctors were found to have higher chronic illness burden compared with community norms. Almost half were the subject of patient complaints or of poor performance within ten years of presentation.Conclusion: To our knowledge there has been no other comprehensive examination of patterns of impairment in older doctors. Older doctors are prone to suffer “the four Ds”: dementia, drugs, drink and depression. We need to encourage mature doctors to adapt to age-related changes and illness and validate their right to timely and appropriate retirement.


1887 ◽  
Vol 42 (251-257) ◽  
pp. 390-390

Since the transmission of the evidence of the large extinct species of Echidna ,the subject of the paper (‘Phil. Trans.,’ 1884, p. 273, Plate 14), the discoverer of the specimen, Ed. P. Ramsay, Esq., F. L. S., has prosecuted his researches in the “Wellington bone and breccia caves, New South Wales,” and has added to the mutilated subject of that paper an entire humerus, a large portion of the skull, the atlas vertebra, a tibia, and fragmentary evidences of other parts of the same skeleton—adding to the knowledge of a former existence in Australia of Echidna Ramsayi .


1883 ◽  
Vol 36 (228-231) ◽  
pp. 4-4

In this communication the author gives a description of a fossil humerus from the breccia cave of Wellington Valley, which repeats the characters of that bone in the existing monotrematous genus Echidna more closely than those of the same bone in any other known kind of mammal. The fossil, however, greatly exceeds in size that of the existing Australian species, Echidna hystrix , Cuv. The existence of, at least, two other kinds lately discovered living in New Guinea has been made known in memoirs by Professor Gervais and Mr. E. P. Ramsay, E .L .S.; these occupy, in respect of size, the interval between them and the Australian Ech. hystrix , but the subject of the present paper makes known the largest Monotreme hitherto discovered. Figures of the fossil in question, and of the corresponding bone of the smaller existing Australian kind, accompany the text. The fossil formed part of the series of remains obtained from the cave above cited, and was with them submitted to the author, who proposes to indicate the present acquisition by the name Echidna Ramsayi .


2017 ◽  
Vol 57 (2) ◽  
pp. 418
Author(s):  
Diane Crosdale

In November 2014 the New South Wales (NSW) Government set out a series of actions to pause, reset and restart a sustainable gas industry for NSW. NSW gas demand and supply reinforce the need for the development of a gas industry. Under this reset, gas exploration areas will be released through the Strategic Release Framework process. The Framework is an independent and transparent process. Utilising geological, economic, environmental and social data including the outcomes of community engagement, areas considered suitable for exploration will be nominated for release. The Framework recognises that there are competing uses for land, and seeks to balance these interests. The Advisory Body, being the independent review body, will conduct these assessments. All release areas will be the subject of a competitive selection process.


2003 ◽  
Vol 43 (1) ◽  
pp. 71 ◽  
Author(s):  
M. K. Conyers ◽  
C. L. Mullen ◽  
B. J. Scott ◽  
G. J. Poile ◽  
B. D. Braysher

The cost of buying, carting and spreading limestone, relative to the value of broadacre crops, makes investment in liming a questionable proposition for many farmers. The longer the beneficial effects of limestone persist, however, the more the investment in liming becomes economically favourable. We re-established previous lime trials with the aim of measuring the long-term effects of limestone on surface acidity (pH run-down), subsurface acidity (lime movement) and grain yield. The study made use of experiments where there was adequate early data on soil chemical properties and cereal yields. We report data from 6 trials located at 4 sites between Dubbo and Albury in New South Wales. The rate of surface soil (0–10 cm) pH decline after liming was proportional to the pH attained 1 year after liming. That is, the higher the pH achieved, the more rapid the rate of subsequent pH decline. Since yields (product removal) and nitrification (also acid producing) may both vary with pH, the post-liming pH acts as a surrogate for the productivity and acid-generating rate of the soil–plant system. The apparent lime loss rate of the surface soils ranged from the equivalent of nearly 500 kg limestone/ha.year at pH approaching 7, to almost zero at pH approaching 4. At commercial application rates of 2–2.5 t/ha, the movement of alkali below the layer of application was restricted. However, significant calcium (Ca) movement sometimes occurred to below 20 cm depth. At rates of limestone application exceeding the typical commercial rate of 2.5 t/ha, or at surface pH greater than about 5.5, alkali and Ca movement into acidic subsurface soil was clearly observed. It is therefore technically feasible to ameliorate subsurface soil acidity by applying heavy rates of limestone to the soil surface. However, the cost and risks of this option should be weighed against the use of acid-tolerant cultivars in combination with more moderate limestone rates worked into the surface soil.There was a positive residual benefit of limestone on cereal grain yield (either barley, wheat, triticale, or oats) at all sites in both the 1992 and 1993 seasons. While acid-tolerant cultivars were less lime responsive than acid-sensitive ones, the best yields were generally obtained using a combination of liming and acid-tolerant cultivars.The long-term residual benefits of limestone were shown to extend for beyond 8–12 years and indicate that liming should be profitable in the long term.


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