ANL/RBC: A computer code for the analysis of Rankine bottoming cycles, including system cost evaluation and off-design performance

This report describes, and is a User's Manual for, a computer code (ANL/RBC) which calculates cycle performance for Rankine bottoming cycles extracting heat from a specified source gas stream. The code calculates cycle power and efficiency and the sizes for the heat exchangers, using tabular input of the properties of the cycle working fluid. An option is provided to calculate the costs of system components from user defined input cost functions. These cost functions may be defined in equation form or by numerical tabular data. A variety of functional forms have been included for these functions and they may be combined to create very general cost functions. An optional calculation mode can be used to determine the off-design performance of a system when operated away from the design-point, using the heat exchanger areas calculated for the design-point

Change in interplanetary shock acceleration preceding STIP Interval 17

The intensity and frequency of shock acceleration events in the interplanetary medium decreased dramatically in early 1985. Low energy ions were observed by IMP 8 at 1 AU and Voyagers 1 and 2 at 22 and 16 AU, respectively. Voyager 1 was at 25 deg heliographic latitude while IMP 8 and Voyager 2 were near the solar equatorial plane. The decrease in low energy shock events led to a drop in the average ion flux by a factor of 20 to 50. It started about day 10 of 1985 in the approximately .5 MeV channel on IMP8 and took approximately 75 days to reach the new, lower, background level. The decrease at the Voyagers started approximately 50 days later. The time delay between the start of the decrease at IMP and at Voyager 2 implies that decrease was convected outward with a velocity of approximately 535 km/sec. The intensity and frequency of interplanetary shock events remained at the lower level for at least 1.5 years

Chapman-Enskog expansion about nonequilibrium states: the sheared granular fluid

The Chapman-Enskog method of solution of kinetic equations, such as the Boltzmann equation, is based on an expansion in gradients of the deviations fo the hydrodynamic fields from a uniform reference state (e.g., local equilibrium). This paper presents an extension of the method so as to allow for expansions about \emph{arbitrary}, far-from equilibrium reference states. The primary result is a set of hydrodynamic equations for studying variations from the arbitrary reference state which, unlike the usual Navier-Stokes hydrodynamics, does not restrict the reference state in any way. The method is illustrated by application to a sheared granular gas which cannot be studied using the usual Navier-Stokes hydrodynamics.Comment: 23 pages, no figures. Submited to PRE Replaced to correct misc. errors Replaced to correct misc. errors, make notation more consistant, extend discussio

The hydrolytic activity of bovine adrenal medullary plasma membranes towards diadenosine polyphosphates is due to alkaline phosphodiesterase-I

AbstractA hydrolase activity directed against diadenosine 5′,5″′-P1,P4-tetraphosphate (Ap4A) has been solubilised and partially purified from the plasma membrane fraction of bovine adrenal medullary chromaffin tissue in order to determine its relationship to alkaline phosphodiesterase-I/nucleotide pyrophosphatase (PDase-I, EC 3.1.4.1). Activity with the specific dinucleoside tetraphosphatase (EC 3.6.1.17) substrate Ap4A and with the non-specific PDase-I substrate thymidine 5′-monophosphate p-nitrophenyl ester had Km and Vmax values of 2.0 μM and 600 pmol/min/mg protein and 0.2 mM and 26 nmol/min/mg protein respectively and co-chromatographed upon gel filtration and ion-exchange chromatography. Activity with the fluorescent substrates etheno-Ap4A and 4-methylumbelliferyl phenylphosphonate co-electrophoresed on native polyacrylamide gels. No activity was detected which exclusively hydrolysed Ap4A. Immunoblotting of the most purified fraction with an antibody against mouse PC-1, one of the major PDase-I family members, detected bands of 240, 120 and 62 kDa corresponding to PC-1 dimer, monomer and proteolytic fragment. Therefore, the activity previously described as bovine adrenal chromaffin cell ecto(diadenosine polyphosphate hydrolase) (ecto-ApnAase) is a PDase-I, probably bovine PC-1

'It's complicated': reflections on teaching citizenship in Aotearoa New Zealand

The recently redesigned Massey University BA aims to produce responsible, world-conscious graduates who are active citizens, and who demonstrate a critical understanding of the peoples and cultures of 21st century Aotearoa New Zealand and the influences that have shaped them. The suite of compulsory core courses that emerged from this redesign process were developed before the university expressed a commitment to becoming Te Tiriti-led and were not explicitly designed with decolonisation in mind, but they ask questions and provoke reflection that we hope will contribute to decolonisation through the production of a cohort of graduates who have reflected on the multiple factors shaping their own identity, including New Zealand’s colonial past, can locate themselves in relation to global issues, and who have begun to think about questions of and possibilities for agency and action as citizens of ANZ and of the globe. These courses often unsettle indigenous and settler identities and relationships, and challenge student thinking about the rights and responsibilities they have at home and in the wider world. In this paper we reflect on the process of developing and teaching this course as a group of primarily settler / pākehā academics in conversation with Māori colleagues, and on our own learning through teaching. To do this we draw from our experiences and from research undertaken on the teaching of global citizenship in the core to interrogate our roles and responsibilities as academics in relation to decolonisation

Integration through transients for Brownian particles under steady shear

Starting from the microscopic Smoluchowski equation for interacting Brownian particles under stationary shearing, exact expressions for shear-dependent steady-state averages, correlation and structure functions, and susceptibilities are obtained, which take the form of generalized Green-Kubo relations. They require integration of transient dynamics. Equations of motion with memory effects for transient density fluctuation functions are derived from the same microscopic starting point. We argue that the derived formal expressions provide useful starting points for approximations in order to describe the stationary non-equilibrium state of steadily sheared dense colloidal dispersions.Comment: 17 pages, Submitted to J. Phys.: Condens. Matter; revised version with minor correction

Distinct telomere differences within a reproductively bimodal common lizard population

1. Different strategies of reproductive mode, either oviparity (egg‐laying) or viviparity (live‐bearing), will be associated with a range of other life‐history differences that are expected to affect patterns of ageing and longevity. It is usually difficult to compare the effects of alternative reproductive modes because of evolutionary and ecological divergence. However, the very rare exemplars of reproductive bimodality, in which different modes exist within a single species, offer an opportunity for robust and controlled comparisons. 2. One trait of interest that could be associated with life history, ageing and longevity is the length of the telomeres, which form protective caps at the chromosome ends and are generally considered a good indicator of cellular health. The shortening of these telomeres has been linked to stressful conditions; therefore, it is possible that differing reproductive costs will influence patterns of telomere loss. This is important because a number of studies have linked a shorter telomere length to reduced survival. 3. Here, we have studied maternal and offspring telomere dynamics in the common lizard (Zootoca vivipara). Our study has focused on a population where oviparous and viviparous individuals co‐occur in the same habitat and occasionally interbreed to form admixed individuals. 4. While viviparity confers many advantages for offspring, it might also incur substantial costs for the mother, for example require more energy. Therefore, we predicted that viviparous mothers would have relatively shorter telomeres than oviparous mothers, with admixed mothers having intermediate telomere lengths. There is thought to be a heritable component to telomere length; therefore, we also hypothesized that offspring would follow the same pattern as the mothers. 5. Contrary to our predictions, the viviparous mothers and offspring had the longest telomeres, and the oviparous mothers and offspring had the shortest telomeres. The differing telomere lengths may have evolved as an effect of the life‐history divergence between the reproductive modes, for example due to the increased growth rate that viviparous individuals may undergo to reach a similar size at reproduction