Inexpensive Neutron Imaging Cameras Using CCDs for Astronomy

AbstractWe have developed inexpensive neutron imaging cameras using CCDs originally designed for amateur astronomical observation. The low-light, high resolution requirements of such CCDs are similar to those for neutron imaging, except that noise as well as cost is reduced by using slower read-out electronics. For example, we use the same 2048x2048 pixel “Kodak” KAI-4022 CCD as used in the high performance PCO-2000 CCD camera, but our electronics requires ∼5sec for full-frame read-out, ten times slower than the PCO-2000. Since neutron exposures also require several seconds, this is not seen as a serious disadvantage for many applications. If higher frame rates are needed, the CCD unit on our camera can be easily swapped for a faster readout detector with similar chip size and resolution, such as the PCO-2000 or the sCMOS PCO.edge 4.2

Tuberculous infection in industrial school children: a clinical study, embracing the physical examination, vital capacity, and radiograms, of a group of sixty boys

In conclusion, it may be stated, that the above study includes a short anatomical and pathological review of the glandular system of the neck and thorax, with special reference to tuberculous infection. Thereafter, short reviews are given of certain methods of clinical investigation, followed by a full description, with radiograms in most of the CASES, of 61 healthy schoolboys. These results have been examined in the light of LREYE;`R'S tables, and deductions drawn therefrom. In the course of this study and analysis,it has become obvious,that the clinical investigation of the glandular system is of paramount importance, when looking for evidence of Tuberculous Infection. It has, also been seen,that considerable variety of radiographic appearances could be demonstrated. These appearances however, could not be co- related to any definite physical signs. There is considerable variation, within certain limits, of both physical findings and radiograms, in boys who are perfectly fit, in the sense that they are able to carry on the normal mental and physical activities in a school where they are well housed, well fed, and well educated. This corresponds to the findings of the American Committee of three Clinicians and three Radiologists.A study of the cases in relation to the PIRQUET reaction has shown that the boys who give a positive reaction are, on the whole, more sturdy than those who do not, when analysed from the weight, stem length and chest measurement point of view, in respect of vital capacity readings.Perhaps the most striking, individual finding has been the difference obtained by spinal auscultation from that recorded by other observers. It will be noted in the present series that "whispered voice" and "bronchial breathing" terminate at a lower spinal level than is usually recorded,in almost every case here reported.Another general observation with which I have been impressed, may be noted. When this study was begun I hoped that some standard deviations might be discovered, to co-relate PIRQUET reactions, radiograms, vital capacity readings, and the results of physical examinations. This has not been so. DREYER'S tables have not corresponded in the younger boys, and marked individual deviations have been present all along the line.This irregularity of result shows again, quite clearly, the old truth that assessment of physical fitness, or the evidence of tuberculous infection or disease, cannot be determined by one isolated observation. Of set purpose one vital question in the clinical investigation of these cases has been omitted - viz: the previous history. It is borne in on one, more and more, that the determination of physical fitness, in relation to tuberculosis, can only be found by a complete review of the whole individual situation. The final opinion can only be expressed by the physician, after a due sifting of all the evidence placed before him, derived from the case history, clinical examination, and results of special tests.Finally, it appears clear to me, that tuberculous infection in school children, requires close study and full investigation, both by clinical means and special tests. One is apt to be lulled into a sense of false security, at this age, because of the admittedly low mortality from tuberculosis. It is - as it were - a transition stage between the primary and secondary phase of tuberculosis. It is, therefore, the best time to carry out anticipatory measures when resistance is normally good, and a degree of disciplined life is being carried through. .Evidence of infection must be searched for, as it is not the age when a patient comes to the physician on account of ill health

Validation investigation of the Power Base Survey.

Historically, the assessment of power has suffered from a dearth of psychometrically sound instrumentation. As a result, much of the research on power has been of questionable value. The primary purpose of this study was to assess the validity of the Randolph et al. Power Base Survey; an instrument designed to measure social power. A second purpose was to investigate any ancillary relationships between power profiles, leadership styles, and demographic information. This research is significant because the development of a valid power instrument could potentially make substantial contributions to personnel evaluation and placement (i.e. determining worker/worker and worker/job compatibility) in industry, education, mental health, or any other fields where supervisor-supervisee relations play a prominent role. Several groups of subjects participated in the study. A group of business graduate students provided support for the instrument\u27s reliability using a test-retest procedure. A team of expert judges and a group of undergraduates from a business management course provided substantial face validity evidence for the Power Base Survey. The team of expert judges also gathered strong content validity evidence in support of the Power Base Survey. Little criterion-related validity evidence was obtained to support the Power Base Survey using a sample of 40 supervisors and 80 supervisees. However, these results were likely due to the hypotheses that were investigated since it was easy to find support for alternative hypotheses and explanations in the literature, and because the other validation evidence obtained from the study supported the Power Base Survey. The instrument\u27s construct validity appeared to be strong as measured by inter-item correlations, subscale correlations, and correlations between the Power Base Survey and other power instrumentation in the field. In conclusion, the Randolph et al. Power Base Survey fared fairly well in terms of face validity and construct validity after being subjected to an ambitious validation investigation. Direct application of the Power Base Survey seems to be in order, though as with most instruments, additional evidence of validity would be beneficial

Preventive medicine as applied to pulmonary tuberculosis

This Thesis is the outcome of several years* practical experience in all aspects of the tuberculosis problem. Having been Resident Physician at a Sanatorium, Medical Officer to a Tuberculosis Dispensary^and a Research Scholar in the scientific side of Tuberculosis, I feel that I have seen almost every view of the question. When to this is added my experience in practical sanitation gained as Assistant Medical Office of Health for the Boroughs of Leith and Derby.and for the City of Lincoln, I feel that I am in some degree qualified to express an opinion on the public health aspects of the disease Tuberculosis. In the course of this Thesis there will be included several pieces of original work, in addition to a digest of a considerable amount of literature on the subject. The main part of the thesis, however, will consist of the exposition of views which I have come to regard as essential to the success of any campaign on the part of the public health authorities against the disease Tuberculosis

Nurturing America\u27s Growth in the Global Marketplace Through Talent Development: An Interim Report on the Evaluation of Generations II and III of WIRED

This is the first report from the evaluation of Generations II and III of the Workforce Innovations in Regional Economic Development Initiative... This interim report presents baseline information from all 26 regions. It reflects the status of regional activities as of the summer of 2008, when many regions were in the initial stage of implementation. Thus, the report focuses on the development of partnerships, governance arrangements, and the design of decision-making processes. In early 2006, ETA announced the initial recipients of grants to promote regional collaboration of a wide range of public and private organizations with the goal of transforming their regional approaches for addressing economic challenges. The grants were intended to bring together diverse regional organizations in order to work towards economic stability and workforce growth. Thirteen additional regions were competitively selected for grants in January 2007, followed by a final 13 in June 2007. These grantees are collectively referred to as Generations II and III

Bantu medical folk-lore

Having been for some time located,in the border districts, and there coming into frequent contact with the natives; I was struck with the fact that there was a large field for investigation and record of the Medical Folk Lore of the Bantu Tribes; which was becoming more and more difficult of attainment as time went on; owing to the fact that the true unsophisticated native was rapidly becoming a thing of the past, or if one may put it so, becoming contaminated by the advance of civilization. Under the pressure of Colonial rule, magistrates and missionaries, the native character and ways are changing, Breeks and petticoats are endowed with positive virtues. They are made steps in the ladder that tends upwards, and the old fashioned Kaffir is fast disappearing. Red clay gives way to veneer and varnish; outward conformity to a kind of civilization knocks off some objectionable/and some quite unobjectionable ways and leaves the inside man as superstitious and as: ignorant as ever.With a view to the carrying out of this idea, I after considerable study of the works of travellers and others who had written about these tribes, drew up a list of questions on the subject. These I had printed,and sent to a large number of all those likely to be able to assist me in my investigation; including missionaries to the tribes, doctors long settled in native areas, educated natives and a large number of others, such as some of the. Cape Civil Servants who had to deal with the aborigine in the early days of European occupation of the country.The replies to these circulars were in many instances very valuable for my purpose, and the following pages are the result of a very careful sifting of this information, combined with such other facts as I have been able to gather together from an extensive study of the records available in the matter.In submitting this study I trust it will meet with approval and that the matter here brought together for the first time, may prove of some value as a record of the "Folk-Lore of the Bantu Tribes".For convenience sake I have divided my subject into three chief sections: (1) The Kaffir Doctor (2) Some observations of interest in the Folk Lore of the Kaffir. (3) Native Practices: (a) Medicine; (b) Surgery; (c) Midwifery and Gynecology.The foregoing pages prove to us that the Kaffir races, as represented by their "Amagqira" possess no mean amount of Knowledge of disease and its treatment, and their extensive use of herbs shows, in an astonishing degree, the very valuable information which the tribes possess of the therapeutic actions,and uses of the vegetable Kingdom, as it exists in those parts of the country which they inhabit