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Pole
Kinds of Pole Terms modified by Pole Selected AbstractsBiogeochemistry of a gypsum-encrusted microbial ecosystemGEOBIOLOGY, Issue 3 2004D. E. CANFIELD ABSTRACT Gypsum crusts containing multicolored stratified microbial populations grow in the evaporation ponds of a commercial saltern in Eilat, Israel. These crusts contain two prominent cyanobacterial layers, a bright purple layer of anoxygenic phototrophs, and a lower black layer with active sulphate reduction. We explored the diel dynamics of oxygen and sulphide within the crust using specially constructed microelectrodes, and further explored the crust biogeochemistry by measuring rates of sulphate reduction, stable sulphur isotope composition, and oxygen exchange rates across the crust,brine interface. We explored crusts from ponds with two different salinities, and found that the crust in the highest salinity was the less active. Overall, these crusts exhibited much lower rates of oxygen production than typical organic-rich microbial mats. However, this was mainly due to much lower cell densities within the crusts. Surprisingly, on a per cell-volume basis, rates of photosynthesis were similar to organic-rich microbial mats. Due to relatively low rates of oxygen production and deep photic zones extending from 1.5 to 3 cm depth, a large percentage of the oxygen produced during the day accumulated into the crusts. Indeed, only between 16% to 34% of the O2 produced in the crust escaped, and the remainder was internally recycled, used mainly in O2 respiration. We view these crusts as potential homologs to ancient salt-encrusted microbial ecosystems, and we compared them to the 3.45 billion-year-old quartz barite deposits from North Pole, Australia, which originally precipitated gypsum. [source] Exploratory Analysis of Similarities in Solar Cycle Magnetic Phases with Southern Oscillation Index Fluctuations in Eastern AustraliaGEOGRAPHICAL RESEARCH, Issue 4 2008ROBERT G.V. BAKER Abstract There is growing interest in the role that the Sun's magnetic field has on weather and climatic parameters, particularly the ~11 year sunspot (Schwab) cycle, the ~22 yr magnetic field (Hale) cycle and the ~88 yr (Gleissberg) cycle. These cycles and the derivative harmonics are part of the peculiar periodic behaviour of the solar magnetic field. Using data from 1876 to the present, the exploratory analysis suggests that when the Sun's South Pole is positive in the Hale Cycle, the likelihood of strongly positive and negative Southern Oscillation Index (SOI) values increase after certain phases in the cyclic ~22 yr solar magnetic field. The SOI is also shown to track the pairing of sunspot cycles in ~88 yr periods. This coupling of odd cycles, 23,15, 21,13 and 19,11, produces an apparently close charting in positive and negative SOI fluctuations for each grouping. This Gleissberg effect is also apparent for the southern hemisphere rainfall anomaly. Over the last decade, the SOI and rainfall fluctuations have been tracking similar values to that recorded in Cycle 15 (1914,1924). This discovery has important implications for future drought predictions in Australia and in countries in the northern and southern hemispheres which have been shown to be influenced by the sunspot cycle. Further, it provides a benchmark for long-term SOI behaviour. [source] Sedimentary and crustal structure from the Ellesmere Island and Greenland continental shelves onto the Lomonosov Ridge, Arctic OceanGEOPHYSICAL JOURNAL INTERNATIONAL, Issue 1 2010H. Ruth Jackson SUMMARY On the northern passive margin of Ellesmere Island and Greenland, two long wide-angle seismic reflection/refraction (WAR) profiles and a short vertical incident reflection profile were acquired. The WAR seismic source was explosives and the receivers were vertical geophones placed on the sea ice. A 440 km long North-South profile that crossed the shelf, a bathymetric trough and onto the Lomonosov Ridge was completed. In addition, a 110 km long profile along the trough was completed. P -wave velocity models were created by forward and inverse modelling. On the shelf modelling indicates a 12 km deep sedimentary basin consisting of three layers with velocities of 2.1,2.2, 3.1,3.2 and 4.3,5.2 km s,1. Between the 3.1,3.2 km s,1 and 4.3,5.2 km s,1 layers there is a velocity discontinuity that dips seaward, consistent with a regional unconformity. The 4.3,5.2 km s,1 layer is interpreted to be Palaeozoic to Mesozoic age strata, based on local and regional geological constraints. Beneath these layers, velocities of 5.4,5.9 km s,1 are correlated with metasedimentary rocks that outcrop along the coast. These four layers continue from the shelf onto the Lomonosov Ridge. On the Ridge, the bathymetric contours define a plateau 220 km across. The plateau is a basement high, confirmed by short reflection profiles and the velocities of 5.9,6.5 km s,1. Radial magnetic anomalies emanate from the plateau indicating the volcanic nature of this feature. A lower crustal velocity of 6.2,6.7 km s,1, within the range identified on the Lomonosov Ridge near the Pole and typical of rifted continental crust, is interpreted along the entire line. The Moho, based on the WAR data, has significant relief from 17 to 27 km that is confirmed by gravity modelling and consistent with the regional tectonics. In the trough, Moho shallows eastward from a maximum depth of 19,16 km. No indication of oceanic crust was found in the bathymetric trough. [source] Reply to comment by C. Wunsch on ,Wind stress forcing of the North Sea "Pole Tide",'GEOPHYSICAL JOURNAL INTERNATIONAL, Issue 1 2001B. F. Chao No abstract is available for this article. [source] The annual cycle and interannual variability of atmospheric pressure in the vicinity of the North PoleINTERNATIONAL JOURNAL OF CLIMATOLOGY, Issue 10 2003Richard I. Cullather Abstract A comparison of National Centers for Environmental Prediction,National Center for Atmospheric Research reanalysis six-hourly sea-level pressure data with former Soviet drifting station observations over the central Arctic Basin reveals high monthly correlations throughout the period 1950,91, but also a preferred winter season negative bias of about 1.4 hPa. Using the reanalysis, supplemented by Arctic Ocean Buoy Program fields and in situ observations, a generalized depiction of the annual cycle of pressure fields over the Arctic may be constructed. Above the Canada Basin,Laptev Sea side of the Arctic, the annual cycle of surface pressure is dominated by the first harmonic, which has an amplitude of about 5 hPa and maximum pressure occurring in March. Along the periphery of northern Greenland and extending to the North Pole, a weak semiannual cycle is found in surface pressure with maxima in May and November. The presence of the semiannual variation over time is highly variable. Dynamically, this progression of the annual cycle may be attributed to the transfer of atmospheric mass from Eurasia and into the Canadian Archipelago in spring and the reverse condition in autumn. Over the central Arctic Basin, springtime pressure increases result from an enhanced poleward mass transport from Eurasia. An increase of equatorward transport over the Canadian Archipelago in May and June results in central Arctic pressure decreases into summer. A less distinct temporal separation between the poleward Canadian transport and the equatorward Eurasian transport results in the weaker second pressure maximum in autumn. On interannual time-scales, atmospheric mass over the central Arctic is exchanged with the storm track centres of action in the North Atlantic and North Pacific. In particular, the large decrease in central Arctic Basin sea-level pressure during the late 1980s is due to a large transfer of atmospheric mass into the North Pacific. Copyright © 2003 Royal Meteorological Society [source] The Middle Asian Element in the Southern Rocky Mountain Flora of the western United States: a critical biogeographical reviewJOURNAL OF BIOGEOGRAPHY, Issue 5 2003William A. Weber Abstract Aim, Presentation of an hypothesis suggesting that the extraordinarily similarity of the Russian Altai and the American Southern Rocky Mountain Flora represents an Oroboreal Flora; that had to have had an essential continuity across the northern part of the world in the Tertiary period, constituting a highland and steppe component of the better-known Arcto-Tertiary Flora of eastern and far-western North America and eastern Asia. Location, North America and Middle (Altai) Asia. Methods, Summarization of the author's field and herbarium studies of whole floras over a period of over 60 years, consisting of successive specializations in vascular plants, lichens, and bryophytes. Main conclusions, (1) The modern alpine and associated marginal steppe and montane floras contain taxa of Tertiary age. (2) The floras of the southern mountains antedate those of the present-day Arctic. (3) The Middle Asiatic and the North American floras once enjoyed a contiguous existence over a broad area involving connections between North America and Asia across the North Pole by way of Greenland. Their present disjunctions are products of extinction and attrition of ranges, not of long-distance migration or dispersal mechanisms. (4) North-eastern North American disjunctions of so-called Cordilleran species (the Nunatak hypothesis) need not require explanations involving long-distance dispersal or migration, but represent relictual populations of the once widely distributed Oroboreal flora. [source] Orbit characteristics of the tristatic EISCAT UHF meteorsMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Issue 1 2008C. Szasz ABSTRACT The tristatic EISCAT 930-MHz UHF system is used to determine the absolute geocentric velocities of meteors detected with all three receivers simultaneously at 96 km, the height of the common radar volume. The data used in this study were taken between 2002 and 2005, during four 24-h runs at summer/winter solstice and vernal/autumnal equinox to observe the largest seasonal difference. The observed velocities of 410 tristatic meteors are integrated back through the Earth atmosphere to find their atmospheric entry velocities using an ablation model. Orbit calculations are performed by taking zenith attraction, Earth rotation as well as obliquity of the ecliptic into account. The results are presented in the form of different orbital characteristics. None of the observed meteors appears to be of extrasolar or asteroidal origin; comets, particularly short-period (<200 yr) ones, may be the dominant source for the particles observed. About 40 per cent of the radiants can be associated with the north apex sporadic meteor source and 58 per cent of the orbits are retrograde. There is evidence of resonance gaps at semimajor axis values corresponding to commensurabilities with Jupiter, which may be the first convincing evidence of Jupiter's gravitational influence on the population of small sporadic meteoroids surveyed by radar. The geocentric velocity distribution is bimodal with a prograde population centred around 38 km s,1 and a retrograde population peaking at 59 km s,1. The EISCAT radar system is located close to the Arctic Circle, which means that the North Ecliptic Pole (NEP) is near zenith once every 24 h, i.e. during each observational period. In this particular geometry, the local horizon coincides with the ecliptic plane. The meteoroid influx should therefore be directly comparable throughout the year. [source] Comparison of the atmosphere above the South Pole, Dome C and Dome A: first attemptMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Issue 4 2008S. Hagelin ABSTRACT The atmospheric properties above three sites (Dome C, Dome A and the South Pole) on the Internal Antarctic Plateau are investigated for astronomical applications using the monthly median of the analyses from ECMWF (the European Centre for Medium-Range Weather Forecasts). Radiosoundings extended on a yearly time-scale at the South Pole and Dome C are used to quantify the reliability of the ECMWF analyses in the free atmosphere as well as in the boundary and surface layers, and to characterize the median wind speed in the first 100 m above the two sites. Thermodynamic instability properties in the free atmosphere above the three sites are quantified with monthly median values of the Richardson number. We find that the probability to trigger thermodynamic instabilities above 100 m is smaller on the Internal Antarctic Plateau than on mid-latitude sites. In spite of the generally more stable atmospheric conditions of the Antarctic sites compared to mid-latitude sites, Dome C shows worse thermodynamic instability conditions than those predicted above the South Pole and Dome A above 100 m. A rank of the Antarctic sites done with respect to the strength of the wind speed in the free atmosphere (ECMWF analyses) as well as the wind shear in the surface layer (radiosoundings) is presented. [source] Kinematic structure in the Galactic halo at the North Galactic Pole: RR Lyrae and blue horizontal branch stars show different kinematicsMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, Issue 4 2007T. D. Kinman ABSTRACT Radial velocities and proper motions (derived from the GSC-II data base) are given for 38 RR Lyrae (RRL) stars and 79 blue horizontal branch (BHB) stars in a ,200 deg2 area around the North Galactic Pole (NGP). Both heliocentric (UVW) and galactocentric (VR, V,, Vz) space motions are derived for these stars using a homogeneous distance scale consistent with (m,M)0= 18.52 for the Large Magellanic Cloud (LMC). An analysis of the 26 RRL and 52 BHB stars whose height (Z) above the plane is less than 8 kpc shows that this halo sample is not homogeneous. Our BHB sample (like that of Sirko et al.) has a zero galactic rotation (V,) and roughly isotropic velocity dispersions. The RRL sample shows a definite retrograde rotation (V,=,95 ± 29 km s,1) and non-isotropic velocity dispersions. The combined BHB and RRL sample has a retrograde galactic rotation (V) that is similar to that found by Majewski for his sample of subdwarfs in Selected Area (SA) 57. The velocity dispersion of the RRL stars that have a positive W motion is significantly smaller than the dispersion of those ,streaming down' with a negative W. Also, the ratio of RRL to BHB stars is smaller for the sample that has positive W. Our halo sample occupies 10.4 kpc3 at a mean height of 5 kpc above the Galactic plane. In this volume, one component (rich in RRL stars) shows retrograde rotation and the streaming motion that we associate with the accretion process. The other component (traced by the BHB stars) shows essentially no rotation and less evidence of streaming. These two components have horizontal branch (HB) morphologies that suggest that they may be the field star equivalents of the young and old halo globular clusters, respectively. Clearly, it is quite desirable to use more than one tracer in any kinematic analysis of the halo. [source] USS Annapolis:The Wardroom and The Crews MessNAVAL ENGINEERS JOURNAL, Issue 1 2003Cdr. E.D. Maissian USNR (Ret.) BACKGROUND USS Annapolis (PG-10) was the first of four gunboats (Vicksburg, Newport, Princeton) built during the transition period of the maritime world, that is -sail to steam, wood to steel. The Annapolis' original barkentine rig was of the composite type, typical for the day , steel keel and frames, steel shell plating from main deck to waterline, and wood planking with copper sheathing to the keel. Copper being resistant to barnacles, this method was used, in as much as dry docks were a scarcity in those days. Rear Admiral Phillip Hichborn, chief constructor of the Bureau of Construction and Repair, designed the hull. Rear Admiral George Wallace Melville, chief of the Bureau of Steam Engineering, designed her power plant. He was one of few survivors of the Jeannette expedition through the Bering Straits to the North Pole. Her power plant was a triple expansion reciprocating steam engine, better known as an "Up-n-Downer". Steam was supplied by two watertube boilers at 180 psi. These gunboats were pioneers in the use of watertube boilers. [source] Metternich, Bismarck, and the Myth of the "Long Peace," 1815,1914PEACE & CHANGE, Issue 3 2007Sheldon Anderson Many Western scholars and foreign-policy makers have lauded the Congress of Vienna, Metternich's "Concert of Europe," and Prussian chancellor Otto von Bismarck's alliance system for keeping a "long peace" from 1815 to 1914. The superiority of nineteenth-century statecraft is a myth. Europe was busy at war between 1815 and 1914, if not in conflicts on the scale of the Napoleonic Wars and World War I. Furthermore, the chancelleries of nineteenth-century Europe not only quelled national uprisings, but suppressed peoples' political rights and waged imperial wars throughout Africa and Asia. From the perspective of a Pole, a disenfranchised European, or an Indian, the century was not a "long peace" but a "long war." [source] Northern Hemisphere stratospheric summer from MIPAS observationsTHE QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, Issue 622 2007W. A. Lahoz Abstract Data from the MIPAS instrument on Envisat, supplemented by meteorological analyses from ECMWF and the Met Office, are used to study the meteorological and trace-gas evolution of the stratosphere in the Northern Hemisphere during spring and summer 2003. A Pole-centred approach, together with sequences of vertical profiles along the viewing tracks of the MIPAS instrument, is used to interpret the data in the physically meaningful context of the evolving summertime high. During April the vortex break-up and build-up of the summertime high gives rise, in the mid-stratosphere, to a ,frozen-in' anticyclone (FrIAC), over the Pole, encircled by vortex fragments at ,50°N. As the summer moves on, the FrIACs and vortex fragments are gradually smoothed out but they persist in the mid- and upper stratosphere until July,August as roughly zonally symmetric W-shaped tracer isopleths. The persistence of the W shows the slowness of isentropic mixing processes at these levels during the summer. As the summertime high becomes dominant during June,August, net photochemical ozone loss produces a low ozone pool in the lower and mid-stratosphere. Finally, as the summertime high decays and the wintertime polar vortex builds up from September onward, the low ozone pool extends vertically throughout the stratosphere, and the tracer isopleths at high latitudes start to dip, showing the effects of wintertime diabatic descent. Of these features, to our knowledge, the W-shaped tracer isopleths have not been observed previously. Copyright © 2007 Royal Meteorological Society [source] Modelling the impact of oxygenated VOC and meteorology upon the boundary layer photochemistry at the South PoleATMOSPHERIC SCIENCE LETTERS, Issue 1 2007P. D. Hamer Abstract A chemistry box model is used to explore implications of recent measurements of methyl hydroperoxide (MHP) across Antarctica and their influence upon high ozone events in the South Pole boundary layer. To reconcile, recent data models suggest that chemistry and meteorology play an important role. Copyright © 2007 Royal Meteorological Society [source] Geomagnetism by the North Pole, anno 1769: The Magnetic Observations of Maximilian Hell during his Venus Transit ExpeditionCENTAURUS, Issue 2 2007Per Pippin Aspaas Hell's site of observation was Vardø in the remote northeastern corner of Norway. He had ambitions to present his journey and scientific results,which reached far beyond astronomy,in a grand work entitled Expeditio litteraria ad Polum arcticum. This work was never printed, although several fragments were published otherwise. Among the pieces not published were his geomagnetic observations. Hell's original manuscripts contain a considerable amount of declination readings as well as notes on instruments, practical procedures, and theoretical reflections involved in his work. In Vardø he set up a magnetic observatory, along with the astronomical one, and recorded, on an irregular schedule, the magnetic declination several times a day from April to June 1769. The records exhibit a clear signature of the diurnal variation as well as magnetic storms. Hell vigorously refuted contemporary suggestions of a connection between magnetic storms and Northern Lights. On the return voyage, a number of observations of magnetic declination along Norway were carried out, with a technique combining a gnomon with observations of the Sun's altitude with a quadrant. [source] Perceived legitimacy of intergroup status differences: its prediction by relative ingroup prototypicalityEUROPEAN JOURNAL OF SOCIAL PSYCHOLOGY, Issue 4 2002Ulrike Weber Research demonstrates that the perceived legitimacy of intergroup status differences has profound effects on intergroup attitudes, emotions and behavior. However, there has only been little intergroup research that predicts the perception of legitimacy. We hypothesize that the perception of legitimate or illegitime status relations depends upon the perceived relative prototypicality of the ingroup for the inclusive category. Since the prototype of the inclusive category provides a normative comparison standard for subgroup evaluation, similarity to this standard (i.e. prototypicality) should be positively evaluated and used to justify high status. A first study in a natural intergroup context (N,=,67) offered correlational data in support of the predicted relationship. The second study (N,=,60), using Germans as ingroup with Poles as outgroup and Europe as inclusive category, demonstrated that the link between prototypicality and legitimacy is contingent upon the valence of the inclusive category. In order to elucidate the causal direction, the third study manipulated relative prototypicality in an artificial intergroup context (N,=,94) and introduced status as a moderator variable. Overall, we found strong support for the hypothesis that legitimacy is related to prototypicality and that this relation is moderated by ingroup status and valence of the inclusive category. Copyright © 2002 John Wiley & Sons, Ltd. [source] Distribution of killer cell immunoglobulin-like receptor genes in PolesINTERNATIONAL JOURNAL OF IMMUNOGENETICS, Issue 4-5 2008E. Majorczyk Summary Killer cell immunoglobulin-like receptors (KIRs) present on natural killer cells and minor subpopulations of T cells recognize class I human leucocyte antigen (HLA) molecules on the surface of target cells. Humans differ by the presence or absence of some KIR genes on their chromosomes. As KIRs are important for the outcome of tissue transplantation (particularly for haematopoietic stem cell transplantation) and possibly for pregnancy and autoimmune diseases, knowledge of the KIR gene distribution in a given human population is of practical value. Therefore, we tested 363 healthy individuals from Western Poland for the presence or absence of KIR genes. Results are compared with those published for other human populations. KIR gene frequencies in Poles are close to these in other Caucasoids but different from those in Asian and African populations, and particularly distant from those in Australian Aborigines. [source] Exploring Diversity in Immigrant Assimilation and Transnationalism: Poles and Russian Jews in Philadelphia,INTERNATIONAL MIGRATION REVIEW, Issue 4 2004Ewa Morawska This article investigates different patterns of coexistence of assimilation and transnational engagements (A/T) among recent Polish and Jewish Russian immigrants in Philadelphia and the particular constellations of circumstances that generate these outcomes. It then integrates this analysis into a broader comparative examination of the simultaneity of A/T among residentially dispersed Asian Indians, first-wave Cubans in Miami, and Jamaicans, undocumented Chinese, and Dominicans in New York. The main factors shaping the most common A/T patterns in these seven immigrant groups at the global, sending and receiving society national, and local levels are identified. [source] Resistance to Deficient Organizational Authority: The Impact of Culture and Connectedness in the WorkplaceJOURNAL OF APPLIED SOCIAL PSYCHOLOGY, Issue 4 2009Wilhelmina Wosinska In 2 countries differing on individualistic,collectivistic orientation, we investigated resistance to a request made by a manager perceived as lacking personal power based on a key attribute (e.g., expertise, relationality). Results of an experiment with Polish and American participants were consistent with cultural differences in the preferred attribute of leaders in the 2 nations. Participants were more resistant to a manager who lacked the attribute more valued in their culture: Americans were more resistant to managers perceived as lacking in expertise, whereas Poles were more resistant to managers perceived as lacking in relational skills. This effect occurred only under conditions of well-established workplace relationships, suggesting that group connectedness creates a tendency to behave in line with predominant cultural norms. [source] The island rule and the evolution of body size in the deep seaJOURNAL OF BIOGEOGRAPHY, Issue 9 2006Craig R. McClain Abstract Aim, Our goal is to test the generality of the island rule , a graded trend from gigantism in small-bodied species to dwarfism in large-bodied species , in the deep sea, a non-insular but potentially analogous system. Location, Shallow-water and deep-sea benthic habitats in the western Atlantic Ocean from the North to South Poles. Methods, We conducted regression analyses of body size of deep-sea gastropods species relative to their shallow-water congeners using measurements from the Malacolog ver. 3.3.3 database. Results, Our results indicate that, consistent with the island rule, gastropod genera with small-bodied, shallow-water species have significantly larger deep-sea representatives, while the opposite is true for genera that are large-bodied in shallow water. Bathymetric body size clines within the deep sea are also consistent with predictions based on the island rule. Main conclusions, Like islands, the deep sea is characterized by low absolute food availability, leading us to hypothesize that the island rule is a result of selection on body size in a resource-constrained environment. The body size of deep-sea species tends to converge on an optimal size for their particular ecological strategy and habitat. [source] Essentialism and attribution of monstrosity in racist discourse: Right-wing internet postings about Africans and JewsJOURNAL OF COMMUNITY & APPLIED SOCIAL PSYCHOLOGY, Issue 6 2009Peter Holtz Abstract We investigated a total of 4997 postings on an extreme right-wing Internet discussion board with regard to the groups and themes mentioned. The most frequently mentioned target groups were Africans, Jews, Muslims, Poles, and Turks; the most prominent themes and contexts were conspiracy, criminality, exploitation, threats to German identity, infiltration, mind control and harassment, procreation, rape, and sex. We analysed in detail postings about Africans/Blacks and Jews, that is target groups that were the most clearly connected to particular themes. The analysis reveals that extreme right-wing discourse essentializes the target groups of Jews and Africans/Blacks and ascribes them immutable group-specific attributes that effectively make them ,natural kinds'. The group of Jews appears as a kind of their own with super-human powers and influence. Africans and Blacks are despised, firstly because their essential characteristics prohibit them to be categorically mixed with Germans (i.e. to become German by nationality) due to their incompatible essence, and secondly when they procreate with Whites. Such procreation produces ,bastards' that are met with disgust. We argue that essentialist thinking about social and ethnic groups explains a good part of their rejection by right-wing followers. Copyright © 2009 John Wiley & Sons, Ltd. [source] Converging on the Poles: Contemporary Punishment and Democracy in Hemispheric PerspectiveLAW & SOCIAL INQUIRY, Issue 3 2005Angelina Snodgrass Godoy In this article I place U.S. punishment trends in comparative context, seeking to show that the contemporary penal regime in the United States resembles patterns of governance prevalent throughout Latin America, the world's most economically unequal region. In both the U.S. and Latin America, I argue, neoliberal reforms have produced societies characterized by ever greater divides between the haves and have-nots, and state criminal justice institutions increasingly position themselves to police this boundary rather than mitigate its effects. In this article, I examine these trends through the lens of wars on crime and terrorism, arguing that in societies polarized between a dwindling set of haves and an ever more numerous (and potentially unruly) group of have-nots, an inexorable pull makes criminal justice institutions more aggressive in their enforcement of class and racial boundaries. Hallmarks include a widening of the criminal justice net (by broadening definitions of criminal activity, for example) and a deepening of the deprivations visited on those ensnared within it. The article concludes with reflections on the need for reconfiguring conceptions of human rights and their relation to security. [source] Mitochondrial DNA variability in Poles and RussiansANNALS OF HUMAN GENETICS, Issue 4 2002B. A. MALYARCHUK Mitochondrial DNA (mtDNA) sequence variation was examined in Poles (from the Pomerania-Kujawy region; n = 436) and Russians (from three different regions of the European part of Russia; n = 201), for which the two hypervariable segments (HVS I and HVS II) and haplogroup-specific coding region sites were analyzed. The use of mtDNA coding region RFLP analysis made it possible to distinguish parallel mutations that occurred at particular sites in the HVS I and II regions during mtDNA evolution. In total, parallel mutations were identified at 73 nucleotide sites in HVS I (17.8%) and 31 sites in HVS II (7.73%). The classification of mitochondrial haplotypes revealed the presence of all major European haplogroups, which were characterized by similar patterns of distribution in Poles and Russians. An analysis of the distribution of the control region haplotypes did not reveal any specific combinations of unique mtDNA haplotypes and their subclusters that clearly distinguish both Poles and Russians from the neighbouring European populations. The only exception is a novel subcluster U4a within subhaplogroup U4, defined by a diagnostic mutation at nucleotide position 310 in HVS II. This subcluster was found in common predominantly between Poles and Russians (at a frequency of 2.3% and 2.0%, respectively) and may therefore have a central-eastern European origin. [source] Environmental Costing in Capital Investment Decisions: Electricity Distributors and the Choice of Power PolesAUSTRALIAN ACCOUNTING REVIEW, Issue 1 2008Craig Deegan Australian electricity distribution businesses use a vast number of poles in their networks. In making their purchase decisions, they can choose between types of pole. It might come from an old-growth forest or a plantation, or be made from cement, steel or fibreglass. This paper discusses how Australian electricity distribution businesses currently account (or fail to account) for the social and environmental implications of the production and use of power poles. The discussion highlights the many factors to be considered in a life-cycle costing exercise. The paper provides suggestions for future practice which have implications not only for electricity distribution businesses, but for industry generally. [source] Fast direct solvers for Poisson equation on 2D polar and spherical geometriesNUMERICAL METHODS FOR PARTIAL DIFFERENTIAL EQUATIONS, Issue 1 2002Ming-Chih Lai Abstract A simple and efficient class of FFT-based fast direct solvers for Poisson equation on 2D polar and spherical geometries is presented. These solvers rely on the truncated Fourier series expansion, where the differential equations of the Fourier coefficients are solved by the second- and fourth-order finite difference discretizations. Using a grid by shifting half mesh away from the origin/poles, and incorporating with the symmetry constraint of Fourier coefficients, the coordinate singularities can be easily handled without pole condition. By manipulating the radial mesh width, three different boundary conditions for polar geometry including Dirichlet, Neumann, and Robin conditions can be treated equally well. The new method only needs O(MN log2N) arithmetic operations for M × N grid points. © 2002 John Wiley & Sons, Inc. Numer Methods Partial Differential Eq 18: 56,68, 2002 [source] Simple NMR-mouse with a bar magnet,CONCEPTS IN MAGNETIC RESONANCE, Issue 4 2002B. Blümich Abstract A new concept of the NMR Mobile Universal Surface Explorer (NMR-MOUSE) using simple bar magnets instead of u-shaped magnets is described. The magnetic field profiles are comparatively homogeneous in extended lateral planes, and close to the magnet pole face the axial gradient is nearly constant. Different geometric arrangements of figure-8 coils adapted to the sample geometry are described. Simulations and measurements of the magnetic field from the magnets and the radio frequency coils are discussed. © 2002 Wiley Periodicals, Inc. Concepts in Magnetic Resonance (Magn Reson Engineering) 15: 255,261, 2002 [source] Expression and distribution of distinct variants of E-MAP-115 during proliferation and differentiation of human intestinal epithelial cellsCYTOSKELETON, Issue 4 2003Marie-Thérèse Vanier Abstract Epithelial cell proliferation and differentiation occur concomitant with striking remodeling of the cytoskeleton. Microtubules (MTs) play important roles in these processes, during which the MTs themselves are reorganized and stabilized by microtubule-associated proteins (MAPs). Among the proteins classified as structural MAPs, E-MAP-115 (also named ensconsin) is preferentially expressed in cells of epithelial origin. The aims of this study were, first, to determine if E-MAP-115, like other MAPs, is expressed as different isoforms during differentiation and, second, to perform a detailed analysis of the expression and distribution of any E-MAP-115 variants detected in intestinal epithelial cells during their polarization/differentiation. It was our expectation that these data would help us to develop hypotheses concerning the role of this MAP in epithelial development. We report the expression of three E-MAP-115 transcripts encoding isoforms of 115, 105, and 95 kDa; two display an expression gradient inverse to the third one as Caco-2 cells progress from proliferation through the stages of differentiation. To monitor the proteins produced from each transcript, we used purified polyclonal antibodies against synthetic peptides contained within the 115, 105, and 95 kDa isoforms to assay proliferating and differentiating CaCo-2 cells. Our results indicate that the expression and MT-binding capacity of the 115, 105, and 95 kDa isoforms vary upon proliferation/differentiation of the cells. E-MAP-115 proteins colocalize with MTs in proliferative and differentiated Caco-2 cells; in vivo, they are expressed in both crypt and villus epithelial cells where they are mainly concentrated at the apical pole of the cells. Cell Motil. Cytoskeleton 55:221,231, 2003. © 2003 Wiley-Liss, Inc. [source] Regional cerebral brain metabolism correlates of neuroticism and extraversionDEPRESSION AND ANXIETY, Issue 3 2006Thilo Deckersbach Ph.D. Abstract Factor-analytic approaches to human personality have consistently identified several core personality traits, such as Extraversion/Introversion, Neuroticism, Agreeableness, Consciousness, and Openness. There is an increasing recognition that certain personality traits may render individuals vulnerable to psychiatric disorders, including anxiety disorders and depression. Our purpose in this study was to explore correlates between the personality dimensions neuroticism and extraversion as assessed by the NEO Five-Factor Inventory (NEO-FFI) and resting regional cerebral glucose metabolism (rCMRglu) in healthy control subjects. Based on the anxiety and depression literatures, we predicted correlations with a network of brain structures, including ventral and medial prefrontal cortex (encompassing anterior cingulate cortex and orbitofrontal cortex), insular cortex, anterior temporal pole, ventral striatum, and the amygdala. Twenty healthy women completed an 18FFDG (18F-fluorodeoxyglucose) positron emission tomography (PET) scan at rest and the NEO-FFI inventory. We investigated correlations between scores on NEO-FFI Neuroticism and Extraversion and rCMRglu using statistical parametric mapping (SPM99). Within a priori search territories, we found significant negative correlations between Neuroticism and rCMRglu in the insular cortex and positive correlations between Extraversion and rCMRglu in the orbitofrontal cortex. No significant correlations were found involving anterior cingulate, amygdala, or ventral striatum. Neuroticism and Extraversion are associated with activity in insular cortex and orbitofrontal cortex, respectively. Depression and Anxiety 23:133,138, 2006. © 2006 Wiley-Liss, Inc. [source] Identification of asymmetrically localized transcripts along the animal,vegetal axis of the Xenopus eggDEVELOPMENT GROWTH & DIFFERENTIATION, Issue 8 2005Kensuke Kataoka In many organisms, proper embryo development depends on the asymmetrical distribution of mRNA in the cytoplasm of the egg. Here we report comprehensive screening of RNA localized in the animal or vegetal hemisphere of the Xenopus egg. Macroarrays including over 40 000 independent embryonic cDNA clones, representing at least 17 000 unigenes, were differentially hybridized with labeled probes synthesized from the mRNA of animal or vegetal blastomeres. After two rounds of screening, we identified 33 clones of transcripts that may be preferentially distributed in the vegetal region of the early stage embryo, but transcripts localized in the animal region were not found. To assess the array results, we performed northern blot and quantitative real-time reverse transcription,polymerase chain reaction analysis. As a result, 21 transcripts of the 33 were confirmed to be localized in the vegetal region of the early stage embryo. Whole-mount in situ hybridization analysis revealed that 11 transcripts, including 7 previously reported genes, were localized in the vegetal hemisphere of the egg. These 11 transcripts were categorized into three groups according to their expression patterns in the egg. The first group, which contained four transcripts, showed uniform expression in the vegetal hemisphere, similar to VegT. The second group, which contained three transcripts, showed gradual expression from the vegetal pole to the equator, similar to Vg1. The last group, which contained three transcripts, was expressed at the germ plasm, similar to Xdazl. One transcript, Xwnt11, showed both the second and the third expression patterns. [source] Ooplasmic segregation in the zebrafish zygote and early embryo: Pattern of ooplasmic movements and transport pathwaysDEVELOPMENTAL DYNAMICS, Issue 8 2010Ricardo Fuentes Abstract Patterns of cytoplasmic movements and organization of transport pathways were examined in live or fixed zygotes and early zebrafish embryos using a variety of techniques. The zygote blastodisc grows by accumulation of ooplasm, transported to the animal pole from distinct sectors of ecto- and endoplasm at different speeds and developmental periods, using specific pathways or streamers. Slow transport (5 ,m/min) occurs during the first interphase along short streamers, whereas fast transport (9.6,40 ,m/min) takes place during the first cleavage division along axial and meridional streamers. Interconnections between streamers allow cargoes to change their speed and final destination. A similar sequence of events occurs during the following divisions. A complex network of microtubules and actin filaments in the endo- and ectoplasm appears to be involved in the transport of inclusions and mRNAs. Actin-dependent intermittent pulsations provoked high-speed back-and-forth movements of cytoplasm that may contribute to redistribution of organelles and maternal determinants. Developmental Dynamics 239:2172,2189, 2010. © 2010 Wiley-Liss, Inc. [source] Early lens development in the zebrafish: A three-dimensional time-lapse analysisDEVELOPMENTAL DYNAMICS, Issue 9 2009Teri M.S. Greiling Abstract In vivo, high-resolution, time-lapse imaging characterized lens development in the zebrafish from 16 to 96 hr postfertilization (hpf). In zebrafish, the lens placode appeared in the head ectoderm, similar to mammals. Delamination of the surface ectoderm resulted in the formation of the lens mass, which progressed to a solid sphere of cells separating from the developing cornea at approximately 24 hpf. A lens vesicle was not observed and apoptosis was not a major factor in separation of the lens from the future cornea. Differentiation of primary fibers began in the lens mass followed by formation of the anterior epithelium after delamination was complete. Secondary fibers differentiated from elongating epithelial cells near the posterior pole. Quantification characterized three stages of lens growth. The study confirmed the advantages of live-cell imaging for three-dimensional quantitative structural characterization of the mechanism(s) responsible for cell differentiation in formation of a transparent, symmetric, and refractile lens. Developmental Dynamics 238:2254,2265, 2009. © 2009 Wiley-Liss, Inc. [source] | ||||||||||||||||||||||||||||||||||||||||||||||||||||