1,028 research outputs found

    LM cathode thruster system Quarterly progress report, 4 Jan. 1969 - 4 Apr. 1970

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    Development of 20 cm liquid metal cathode thruster syste

    On the interactions of lipids and proteins in the red blood cell membrane

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    The effects of temperature and of the action of a purified phospholipase C enzyme preparation on human red blood cell membranes has been investigated by chemical analyses, circular dichroism, and proton magnetic resonance measurements. The results indicate that a substantial fraction of the phospholipids and the proteins of the membranes can change structure independently of one another, suggesting a mosaic pattern for the organization of the lipids and proteins in membranes

    Financial reporting standards for the public sector: New Zealand’s 21st-century experience

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    New Zealand was seen as world-leading when public sector financial reports were prepared using sector-neutral accounting standards from 1995 onwards. The decision in 2002 to adopt IFRS was disruptive, effecting new understandings of ‘sector- neutral’, and the standard-setter’s approach was unsuccessful in meeting public sector users’ needs. The development of a new strategy finalized in 2012 has created a multi- standards framework, including adapted IPSASB standards applicable from 1 July 2014. While neutrality is still prized, it is within a framework of meeting users’ needs. This paper traces the influences expediting these changes

    A theoretical and semiemprical correction to the long-range dispersion power law of stretched graphite

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    In recent years intercalated and pillared graphitic systems have come under increasing scrutiny because of their potential for modern energy technologies. While traditional \emph{ab initio} methods such as the LDA give accurate geometries for graphite they are poorer at predicting physicial properties such as cohesive energies and elastic constants perpendicular to the layers because of the strong dependence on long-range dispersion forces. `Stretching' the layers via pillars or intercalation further highlights these weaknesses. We use the ideas developed by [J. F. Dobson et al, Phys. Rev. Lett. {\bf 96}, 073201 (2006)] as a starting point to show that the asymptotic C3D−3C_3 D^{-3} dependence of the cohesive energy on layer spacing DD in bigraphene is universal to all graphitic systems with evenly spaced layers. At spacings appropriate to intercalates, this differs from and begins to dominate the C4D−4C_4 D^{-4} power law for dispersion that has been widely used previously. The corrected power law (and a calculated C3C_3 coefficient) is then unsuccesfully employed in the semiempirical approach of [M. Hasegawa and K. Nishidate, Phys. Rev. B {\bf 70}, 205431 (2004)] (HN). A modified, physicially motivated semiempirical method including some C4D−4C_4 D^{-4} effects allows the HN method to be used successfully and gives an absolute increase of about 2−32-3% to the predicted cohesive energy, while still maintaining the correct C3D−3C_3 D^{-3} asymptotics

    Queen discrimination by honeybee (Apis mellifera L) workers

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    A simple new technique for testing worker honeybees' ability to distinguish between honeybee queens is presented. Two queens were caged separately with groups of young sibling workers which were the daughters of another queen. The cages were exposed to the same environmental odours for 10 days. When placed in the test apparatus and given a choice of both queens, workers segregated towards the queen with which they had been caged. This provides further evidence that the distinctive odour of an individual queen is probably partly inherited and is learned by workers. The nature and functioning of queen odours are discussed

    The role of facial appearance in gender categorization

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    Of the many systems of social organization which members of US society use to categorize other members, gender is one of the most important. The gender system operates to place members of US society into categories, and then allocate labor and resources to those members on the basis of their category membership. In order to better understand the gender system, this study examines the methods by which members of US society use the gender system to place other members into a gender category. First, full facial photographs were taken of a group of participants of varying gender, race, ethnicity, and age. Then, parts of each participant\u27s face were isolated digitally and shown to a second group of participants. This second group was asked to identify the sex and/or gender of the individual in the image, indicate how confident they were in this identification, and then write a brief explanation for why they identified the individual in the image as they did. The analysis conducted by this study supports three findings. First, though the gender categories male and female are still widely predominant, other categories such as genderqueer are seeing use as well. Second, the mouth and lips tend to be seen as more important indicators of gender than other facial features. Finally, while the race and gender category membership of the member doing the categorizing has little or no interaction with the gender categorization process, the race and gender category membership of the member being categorized does have a significant interaction

    Value engineering in government and private sector construction

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    CIVINS (Civilian Institutions) Thesis documentValue engineering enjoys widespread use throughout the Federal Government and in the private sector. The many billions of dollars saved over the years is a tribute to the effectiveness of applying value engineering methodology to construction projects. The Federal Axquisition Regulations require the use of value engineering in all Federal construction contracts with working estimates of $100,000.00 or more. Many private construction management firms offer value engineering as a part of their pre-construction package of services. This report looks at the similarities and differences of value management programs practiced in the construction management industry today through a comparative look at three major Federal Government acquisition agencies with construction management responsibilities and three large scale private construction firms in the southeastern United States offering Construction Management (CM) services to their clients. The Federal Government has very stringent regulation and guidelines for executing their value management programs. The private firms in this study, on the other hand, appear to do a great job in the area of value management but do not rely as much on regulations and guidelines and more on practical experience and lessons learned. One area in which the Navy is utilizing value management methodology in a unique way is with the Functional Analysis Concept Development (FACD) workshops. These workshops use VE techniques to better define the scope of a proposed project prior to any design efforts. The FACD team consist of representatives of the owner, A&E firm, end user, and the construction management agency. The workshops can be used in conjuction with any acquisition strategy including design-build and have produced award winning designs and completed projects for the clients and customers of Naval Facilities Engineering Command (NAVFACENGCOM). Value engineering propsal databases are capturing a tremendous amount of value added construction materials and methods that can be used on projects of similar scope. With this information at the designers' fingertips, the result should be higher quality designs leaving the drafting tables. This could be especially useful in projects of smaller dollar value that do not justify a full-blown VE study. Value Engineering has been around, in America. since the 1940s and it is still evolving and being improved upon, which should not be surprising since process improvement is at the heart of any value management philosophy.http://archive.org/details/valueengineering1094537783Approved for public release; distribution is unlimited
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