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Kinds of Post Terms modified by Post Selected AbstractsFloristic changes in the British Isles: comparison of techniques for assessing changes in frequency of plants with timeBOTANICAL JOURNAL OF THE LINNEAN SOCIETY, Issue 3 2006TIM C. G. RICH Botanical recording data are often used to assess changes in the frequencies of plant species over time, but are subject to marked variations in recording activity. We compare and evaluate some general methods that can be used to detect changes in species' frequencies taking into account the recording variations. Models for 15 species that have been studied in detail previously were compared using the numbers of individual records, sites, hectads, or vice-counties at different time scales (year, decade, moving averages, and pre-/post- specific dates), with or without correction for recording variation. The best methods had a correction for the amount of recording over time, summarized records by decade or moving average, and used an extrapolation between first and last records for sites or hectads. Increasing the geographical and temporal scales can decrease the influence of recording variations, but leads to a loss of sensitivity and under-estimates the true extent of change. The choice between sites and hectads will depend on the detail of the records available; cruder data sets should use the latter. © 2006 The Linnean Society of London, Botanical Journal of the Linnean Society, 2006, 152, 279,301. [source] Flexural strength of glass fibre-reinforced posts bonded to dual-cure composite resin cementsEUROPEAN JOURNAL OF ORAL SCIENCES, Issue 2 2010Peter Davis Davis P, Melo LSD, Foxton RM, Sherriff M, Pilecki P, Mannocci F, Watson TF. Flexural strength of glass fibre-reinforced posts bonded to dual-cure composite resin cements. Eur J Oral Sci 2010; 118: 197,201. © 2010 The Authors. Journal compilation © 2010 Eur J Oral Sci The aims of this study were to evaluate the flexural strength of two different types of glass fibre-reinforced posts bonded to dual-cure composite resin cements. Forty glass methacrylate-based fibre posts (GC Fiber Post) and 20 glass fibre inter-polymerizing network posts (everStick POST) were divided into three groups. Group 1 contained 20 GC posts that were bonded to a dual-cure composite cement (UnifilCore). Group 2 contained 20 Stick Tech posts that had adhesive applied (Scotchbond Multipurpose resin) and were bonded to a dual-cure composite resin cement (RelyX Unicem). Group 3 contained 20 GC posts that were pretreated with a silane-coupling agent before being treated with resin and composite, as in group 1. A 4-point bend test was carried out to failure on all of the groups. Failure modes were determined using scanning electron microscopy. Pretreatment of the post surface with the silane-coupling agent did not increase the flexural strength. The flexural strength of the Stick Tech post was significantly lower than the flexural strength of the GC post. The mode of failure for the GC Posts was adhesive, whereas the Stick Tech posts failed cohesively. Different flexural strengths and failure modes were observed among the two fibre post,resin systems. [source] Allocation of Photosynthates and Grain Growth of Two Wheat Cultivars with Different Potential Grain Growth in Response to Pre- and Post-anthesis ShadingJOURNAL OF AGRONOMY AND CROP SCIENCE, Issue 5 2003Z. Wang Abstract Grain yield in wheat is dependent on photosynthate production and allocation. Light intensity is one of the main factors affecting photosynthate production and allocation, and grain yield. This study was conducted to determine whether cultivars varying in grain number per spike and grain weight respond differently to pre-anthesis shading (PRE) and post-anthesis shading (POST), and to characterize the responses in production and allocation of photosynthate, yield and yield components, and spike traits. Both PRE and POST caused a decrease in both dry matter (DM) accumulation and allocation to grain. Cultivar Lumai 22, which has a large spike and large grains, was more sensitive to either PRE or POST. PRE reduced photosynthate production and partitioning to the spike in Lumai 22 at anthesis. In contrast, PRE had little influence on these parameters in the small-spike, small-grain cultivar Yannong 15. POST reduced the partitioning to the grain, especially in Lumai 22, for which marked reductions in biomass and grain yield were found for both the PRE and POST treatments. Changes in yield components attributable to shading varied with cultivars. The number of spikes m,2 was not affected by either PRE or POST. Lumai 22 was more seriously affected by shading than Yannong 15 in terms of grain number per spike and weight per grain. The decreases in grain number or weight per spikelet in both the PRE and POST treatments took place mainly in the upper and basal spikelets, especially in Lumai 22. We concluded that the adaptability of the small-spike, small-grain cultivar Yannong 15 to either PRE or POST was much greater than that of the large-spike, large-grain cultivar Lumai 22 in terms of many characteristics closely related to grain yield. Hence, we suggest that, in areas where low light intensity often occurs, the small-spike, small-grain cultivar would be more likely to produce high, stable grain yields. [source] Measurement of varus,valgus and internal,external rotational knee laxities in vivo,Part II: relationship with anterior,posterior and general joint laxity in males and femalesJOURNAL OF ORTHOPAEDIC RESEARCH, Issue 8 2007Sandra J. Shultz Abstract We examined sex differences in general joint laxity (GJL), and anterior,posterior displacement (ANT,POST), varus,valgus rotation (VR,VL), and internal,external rotation (INT,EXT) knee laxities, and determined whether greater ANT and GJL predicted greater VR,VL and INT,EXT. Twenty subjects were measured for GJL, and scored on a scale of 0,9. ANT and POST were measured using a standard knee arthrometer at 133 N. VR,VL and INT,EXT were measured using a custom joint laxity testing device, defined as the angular displacements (deg) of the tibia relative to the femur produced by 0,10 Nm of varus,valgus torques, and 0,5 Nm of internal,external torques, respectively. INT,EXT were measured during both non-weight-bearing (NWB) and weight-bearing (WB,=,40% body weight) conditions while VR,VL were measured NWB. All laxity measures were greater for females compared to males except for POST. ANT and GJL positively predicted 62.5% of the variance in VR,VL and 41.8% of the variance in WB INT,EXT. ANT was the sole predictor of INT,EXT in NWB, explaining 42.3% of the variance. These findings suggest that subjects who score higher on clinical measures of GJL and ANT are also likely to have greater VR,VL and INT,EXT knee laxities. © 2007 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 25:989,996, 2007 [source] Bayesian analysis of mark-recapture data with travel time-dependent survival probabilitiesTHE CANADIAN JOURNAL OF STATISTICS, Issue 1 2008Saman Muthukumarana Abstract The authors extend the classical Cormack-Jolly-Seber mark-recapture model to account for both temporal and spatial movement through a series of markers (e.g., dams). Survival rates are modeled as a function of (possibly) unobserved travel times. Because of the complex nature of the likelihood, they use a Bayesian approach based on the complete data likelihood, and integrate the posterior through Markov chain Monte Carlo methods. They test the model through simulations and apply it also to actual salmon data arising from the Columbia river system. The methodology was developed for use by the Pacific Ocean Shelf Tracking (POST) project. Analyse baye,esienne de donne,es de capture-recapture a, I'aide de probabilites de survie dependant du temps de deplacement Les auteurs généralisent le modèle de capture-recapture classique de Cormack-Jolly-Seber pour tenir compte de déplacements spatiaux-temporels signalés par des marqueurs (tels que des barrages). Les taux de survie sont modélisés en fonction de temps de déplacement parfois inobservables. Vu la complexité de la vraisemblance, ils optent pour une approche bayésienne fondée sur la vraisemblance des données complètes et intègrent la loi a posteriori par des méthodes de Monte-Carlo à cha,ne de Markov. Ils testent le modèle par simulation et l'utilisent pour l'analyse de données sur les saumons du réseau hydrographique de la Columbia. La méthodologie a été développée aux fins du projet POST (Pacific Ocean Shelf Tracking). [source] Prolonged strenuous exercise alters the cardiovascular response to dobutamine stimulation in male athletesTHE JOURNAL OF PHYSIOLOGY, Issue 1 2005Robert C. Welsh Prolonged strenuous exercise has been associated with transient impairment in left ventricular (LV) systolic and diastolic function that has been termed ,cardiac fatigue'. It has been postulated that cardiac ,-adrenoreceptor desensitization may play a central role; however, data are limited. Accordingly, we assessed the cardiovascular response to progressive dobutamine stimulation after prolonged strenuous exercise (2 km swim, 90 km bike, 21 km run). Nine experienced male athletes were studied: PRE (2,3 days before), POST (after) and REC (1,2 days later). The cardiovascular response to progressive continuous dobutamine stimulation (0, 5, 20, and 40 ,g kg,1 min,1) was assessed, including heart rate (HR), systolic blood pressure (SBP), LV cavity areas (two-dimensional echocardiography) and contractility (end-systolic elastance, SBP/end-systolic cavity area (ESCA)). POST there was limited evidence of myocardial necrosis (measured by troponin I), while catecholamines were elevated. HR was higher POST (mean ±s.d.; PRE, 58 ± 9; POST, 79 ± 9; REC, 57 ± 7 beats min,1; P < 0.05), while SBP was lower (PRE, 127 ± 15; POST, 116 ± 9; REC, 121 ± 12 mmHg; P < 0.05). A blunted HR, SBP and LV contractility (SBP/ESCA; PRE 29 ± 6 versus POST 20 ± 6 mmHg cm,2; P < 0.05) response to dobutamine was demonstrated POST, with values returning towards baseline in REC. Following prolonged strenuous exercise, the chronotropic and inotropic response to dobutamine stimulation is blunted. This study supports the hypothesis that beta-receptor downregulation and/or desensitization may play a major role in prolonged-strenuous-exercise-mediated cardiac fatigue. [source] Impact of Human Factor Design on the Use of Order Sets in the Treatment of Congestive Heart FailureACADEMIC EMERGENCY MEDICINE, Issue 11 2007Stewart Reingold MD Background Although standardized physician order sets are often part of quality improvement projects, the specific design elements contributing to increased adoption and compliance with use often are not considered. Objectives To evaluate the impact of human factor design elements on congestive heart failure (CHF) order set utilization, and compliance with recommended CHF clinical practice guidelines (CPG). Methods This was a descriptive retrospective medical record review of adult patients who were admitted from our emergency department with the primary diagnosis of CHF. We collected data on acuity and CPG parameters before and after the introduction of a new CHF order set. The new orders were succinct and visually well organized, with narrative information to encourage use of CPG. Results Eighty-seven patients were studied before, and 84 after, the introduction of new orders. There were no differences in the use of the order sets based on patient acuity before or after the intervention. Order set use significantly increased by the first postintervention interval (POST) and reached 72% (95% confidence interval [CI] = 52% to 86%) during the third POST, compared with a baseline utilization of 9% (95% CI = 5% to 17%; p < 0.001). Compliance with CPG for angiotensin-converting enzyme reached significance in the second POST and was maintained in the third at 83% (95% CI = 61% to 94%), compared with a baseline value of 25% (95% CI = 7% to 59%; p = 0.008). Intravenous nitroglycerin also increased significantly from the first POST and reached 78% (95% CI = 55% to 91%) in the third POST, compared with baseline of 12% (95% CI = 2% to 47%; p < 0.003). Furosemide dosing, systolic blood pressure reduction, and urine output did not significantly change. Conclusions Introduction of an order set for CHF with attention to human factor design elements significantly improved utilization of the orders and compliance with CPG. [source] Changes in left ventricular ejection time and pulse transit time derived from finger photoplethysmogram and electrocardiogram during moderate haemorrhageCLINICAL PHYSIOLOGY AND FUNCTIONAL IMAGING, Issue 3 2009Paul M. Middleton Summary Objectives:, Early identification of haemorrhage is difficult when a bleeding site is not apparent. This study explored the potential use of the finger photoplethysmographic (PPG) waveform derived left ventricular ejection time (LVETp) and pulse transit time (PTT) for detecting blood loss, by using blood donation as a model of controlled mild to moderate haemorrhage. Methods:, This was a prospective, observational study carried out in a convenience sample of blood donors. LVETp, PTT and R-R interval (RRi) were computed from simultaneous measurement of the electrocardiogram (ECG) and the finger infrared photoplethysmogram obtained from 43 healthy volunteers during blood donation. The blood donation process was divided into four stages: (i) Pre-donation (PRE), (ii) first half of donation (FIRST), (iii) second half of donation (SECOND), (iv) post-donation (POST). Results and conclusions:, Shortening of LVETp from 303+/,2 to 293+/,3 ms (mean+/,SEM; P<0·01) and prolongation of PTT from 177+/,3 to 186+/,4 ms (P<0·01) were observed in 81% and 91% of subjects respectively when comparing PRE and POST. During blood donation, progressive blood loss produced falling trends in LVETp (P<0·01) and rising trends in PTT (P<0·01) in FIRST and SECOND, but a falling trend in RRi (P<0·01) was only observed in SECOND. Monitoring trends in timing variables derived from non-invasive ECG and finger PPG signals may facilitate detection of blood loss in the early phase. [source] Mutant Ecologies: Radioactive Life in Post,Cold War New MexicoCULTURAL ANTHROPOLOGY, Issue 4 2004Joseph Masco A political ecology of the nuclear age developed through a theorization of "mutation" interrogates the contemporary terms of radioactive nature in New Mexico. As an analytic, the value of "mutation" is its emphasis on multigenerational effects, enabling an assessment of biosocial transformations as, alternatively, injury, improvement, or noise. Cold War radiation experiments, the post,Cold War transformation of nuclear production sites into "wildlife reserves," and the expanding role that biological beings play as "environmental sentinels" in New Mexico are all sites where concerns about "species" integrity may be articulated in relation to radioactive nature. [source] From Soviet Modernization to Post,Soviet Transformation: Understanding Marriage and Fertility Dynamics in UzbekistanDEVELOPMENT AND CHANGE, Issue 3 2003Victor Agadjanian In this article we analyse the dynamics of marriage and childbearing in Uzbekistan through the prism of the recent socioeconomic and political history of that country. After becoming an independent nation in 1991, Uzbekistan abandoned the Soviet modernization project and aspired to set out on a radically different course of economic, social, and political development. We argue, however, that not only independence but also the preceding period of perestroika reforms (1985,91) had a dramatic effect on social conditions and practices and, consequently, the demographic behaviour of the country's population. Using data from the 1996 Uzbekistan Demographic and Health Survey we apply event,history analysis to examine changes in the timing of entry into first marriage, first and second births over four periods: two periods of pre,perestroika socialism, the perestroika years, and the period since independence. We investigate the factors that influenced the timing of these events in each of the four periods among Uzbeks, the country's eponymous and largest ethnic group, and among Uzbekistan's urban population. In general, our results point to a dialectic combination of continuity and change in Uzbekistan's recent demographic trends, which reflect the complex and contradictory nature of broader societal transformations in that and other parts of the former Soviet Union. [source] Review article: What's new in early medieval burial archaeology?EARLY MEDIEVAL EUROPE, Issue 1 2002Tania M. Dickinson Books reviewed in this article: John Hines, Karen Høilund Nielsen and Frank Siegmund (eds), The Pace of Change. Studies in Early,Medieval Chronology. Catherine E. Karkov, Kelley M. Wickham,Crowley and Bailey K. Young (eds), Spaces of the Living and the Dead: An Archaeological Dialogue. Sam Lucy, The Early Anglo,Saxon Cemeteries of East Yorkshire. An Analysis and Reinterpretation. Elizabeth O'Brien, Post,Roman Britain to Anglo,Saxon England: Burial Practices Reviewed. Nick Stoodley, The Spindle and the Spear. A Critical Enquiry into the Construction and Meaning of Gender in the Early Anglo,Saxon Burial Rite. [source] Politics, Locality, and Economic Restructuring: California's Central Coast Strawberry Industry in the Post,World War II Period,ECONOMIC GEOGRAPHY, Issue 1 2000Miriam J. Wells Abstract: This article challenges overly economistic, static, and homogenizing representations of contemporary economic restructuring through an in-depth ethnographic case study of the central coast California strawberry industry in the post,World War II period. It demonstrates that restructuring is much more uneven in its incidence and complex in its motivation than usually portrayed, and that politics and human agency are at its core. Because of the place-based nature of certain economic activity and the grounded experience of political process, its explication requires a sensitivity to space and place. [source] Flexural strength of glass fibre-reinforced posts bonded to dual-cure composite resin cementsEUROPEAN JOURNAL OF ORAL SCIENCES, Issue 2 2010Peter Davis Davis P, Melo LSD, Foxton RM, Sherriff M, Pilecki P, Mannocci F, Watson TF. Flexural strength of glass fibre-reinforced posts bonded to dual-cure composite resin cements. Eur J Oral Sci 2010; 118: 197,201. © 2010 The Authors. Journal compilation © 2010 Eur J Oral Sci The aims of this study were to evaluate the flexural strength of two different types of glass fibre-reinforced posts bonded to dual-cure composite resin cements. Forty glass methacrylate-based fibre posts (GC Fiber Post) and 20 glass fibre inter-polymerizing network posts (everStick POST) were divided into three groups. Group 1 contained 20 GC posts that were bonded to a dual-cure composite cement (UnifilCore). Group 2 contained 20 Stick Tech posts that had adhesive applied (Scotchbond Multipurpose resin) and were bonded to a dual-cure composite resin cement (RelyX Unicem). Group 3 contained 20 GC posts that were pretreated with a silane-coupling agent before being treated with resin and composite, as in group 1. A 4-point bend test was carried out to failure on all of the groups. Failure modes were determined using scanning electron microscopy. Pretreatment of the post surface with the silane-coupling agent did not increase the flexural strength. The flexural strength of the Stick Tech post was significantly lower than the flexural strength of the GC post. The mode of failure for the GC Posts was adhesive, whereas the Stick Tech posts failed cohesively. Different flexural strengths and failure modes were observed among the two fibre post,resin systems. [source] In vitro fracture behavior of maxillary premolars with metal crowns and several post-and-core systemsEUROPEAN JOURNAL OF ORAL SCIENCES, Issue 3 2006Wietske A. Fokkinga The in vitro fracture behavior of severely damaged premolars, restored with metal crowns with limited ferrule and several post-and-core systems, was investigated. Crowns of maxillary premolars were removed and canals were prepared with Gates Glidden drills and with Parapost drills. Groups of 11 samples were each treated with cast post-and-cores (Parapost XP, Wironium Plus) (group 1), prefabricated metal posts (Parapost XH) (group 2), prefabricated glass fiber posts (Parapost FiberWhite) (group 3), and custom-made glass fiber posts (EverStick Post) (group 4). Posts and composite cores and metal crowns in groups 2, 3, and 4 were adhesively cemented. Post-and-cores and crowns in group 1 were cemented with phosphate cement. Thermocycling was performed (6,000×, 5,55 °C). Two static load tests (30°) were applied. During the first load test (preloading) no failures occurred. Failure modes from the second load test were categorized into favorable and unfavorable failures. Mean failure loads among the four groups (group 1, 1845 N; group 2, 1718 N; group 3, 1812 N; and group 4, 1514 N) were not significantly different. Unfavorable failures were root fractures and favorable failures were postcrown displacements. No differences in frequencies of unfavorable/favorable failures were seen among the groups. The results suggest that different post-and-core systems have no influence on the fracture behavior of severely damaged premolars restored with metal crowns with limited ferrule. [source] Enantiomeric composition of (E)- and (Z)-sabinene hydrate and their acetates in ,ve Origanum spp.FLAVOUR AND FRAGRANCE JOURNAL, Issue 2 2005Olga Larkov Abstract The enantiomers of (E)- and (Z)-sabinene hydrate and of (E)- and (Z)-sabinene hydrate acetate from extracts of Origanum ramonense Danin, O. dayi Post, O. majorana L., O. vulgare L. ssp. vulgare and O. syriacum L. ssp. syriacum were analysed by GC,MS with chiral and non-chiral capillary columns. The order of elution, the enantiomeric ratios and relative percentages of the four pairs of enantiomers were determined. The (1S)-enantiomers of (E)-sabinene hydrate and (E)-sabinene hydrate acetate were predominant in O. dayi, whereas in the other Origanum spp. the (1R)-enantiomers were predominant. (Z)-sabinene hydrate acetate was not detected in O. syriacum, while the (1R)-enantiomer was present in an optically pure form in O. ramonense, O. majorana and O. vulgare; in O. dayi the enantiomeric purity was 97%. The enantiomeric distributions of (E)- and (Z)-sabinene hydrate and their acetates were determined for the ,rst time in Origanum spp. Copyright © 2004 John Wiley & Sons, Ltd. [source] Gender and Welfare Reform in Post- Revolutionary MexicoGENDER & HISTORY, Issue 1 2008Nichole Sanders This article discusses the impact a gender and woman's history conference had on the development of my own research and writing. ,Las Olvidadas' was a conference held at Yale in the Spring of 2001, and was the first in a series of Mexican women's and gender history conferences organised. My own research, on the gendered nature of the welfare state in Mexico, explores how class and race intersected with gender to produce a welfare system that, while particular to Mexico, also nevertheless had much in common with other Latin American countries. These conferences shaped both my views of gender, but also the importance of the transnational to historical research. [source] A Continuing Role For Academics: The Governance of UK Universities in the Post,Dearing EraHIGHER EDUCATION QUARTERLY, Issue 3 2002John Dearlove The governance of higher education has become a recognised cause for concern. Many academics lament the demise of an easy collegiality in the face of the rise of a harder managerialism that robs them of control. But outsiders to the system, concerned about the efficiency and effectiveness of higher education management, are critical of the extent to which academics seem all too eager and able to block changes that might lead to universities better addressing the needs of society. This paper rejects the simple nostrums of both those who hark back to a collegial golden age and those who make the case for a brave managerial future. It argues that universities that are capable of real strategic change in response to challenge are capable of transcending the dichotomy between collegiality and managerialism as modes of organisation. In these successful universities, academics must be involved and prepared to lead, but they must also work in partnership with administrators, in institutions that will be strong to the extent that there is a shared vision that makes the institution rather more than just the sum of warring departments. [source] The Displacement of Black Educators Post -Brown: An Overview and AnalysisHISTORY OF EDUCATION QUARTERLY, Issue 1 2004Michael Fultz First page of article [source] Canadian Borders and Immigration Post 9/11,INTERNATIONAL MIGRATION REVIEW, Issue 1 2002Howard Adelman First page of article [source] Conservatism and Cross-Sectional Variation in the Post,Earnings Announcement DriftJOURNAL OF ACCOUNTING RESEARCH, Issue 4 2006GANAPATHI NARAYANAMOORTHY ABSTRACT Accounting conservatism allows me to identify a previously undocumented source of predictable cross-sectional variation in Standardized Unexpected Earnings' autocorrelations viz. the sign of the most recent earnings realization and present evidence that the market ignores this variation ("loss effect"). It is possible to earn returns higher than from the Bernard and Thomas (1990) strategy by incorporating this feature. Additionally, the paper shows that the "loss effect" is different from the "cross quarter" effect shown by Rangan and Sloan (1998) and it is possible to combine the two effects to earn returns higher than either strategy alone. Thus, the paper corroborates the Bernard and Thomas finding that stock prices fail to reflect the extent to which quarterly earnings series differ from a seasonal random walk and extends it by showing that the market systematically underestimates time-series properties resulting from accounting conservatism. [source] Density-dependent mortality is mediated by foraging activity for prey fish in whole-lake experimentsJOURNAL OF ANIMAL ECOLOGY, Issue 4 2003Peter A. Biro Summary 1Whereas the effects of density-dependent growth and survival on population dynamics are well-known, mechanisms that give rise to density dependence in animal populations are not well understood. We tested the hypothesis that the trade-off between growth and mortality rates is mediated by foraging activity and habitat use. Thus, if depletion of food by prey is density-dependent, and leads to greater foraging activity and risky habitat use, then visibility and encounter rates with predators must also increase. 2We tested this hypothesis by experimentally manipulating the density of young rainbow trout (Oncorhynchus mykiss) at risk of cannibalism, in a replicated single-factor experiment using eight small lakes, during an entire growing season. 3We found no evidence for density-dependent depletion of daphnid food in the nearshore refuge where most age-0 trout resided. Nonetheless, the proportion of time spent moving by individual age-0 trout, the proportion of individuals continuously active, and use of deeper habitats was greater in high density populations than in low density populations. Differences in food abundance among lakes had no effect on measures of activity or habitat use. 4Mortality of age-0 trout over the growing season was higher in high density populations, and in lakes with lower daphnid food abundance. Therefore, population-level mortality of age-0 trout is linked to greater activity and use of risky habitats by individuals at high densities. We suspect that food resources were depleted at small spatial and temporal scales not detected by our plankton sampling in the high density treatment, because food-dependent activity and habitat use by age-0 trout occurs in our lakes when food abundance is experimentally manipulated (Biro, Post & Parkinson, in press). [source] The distribution of South American galaxiid fishes: the role of biological traits and post-glacial historyJOURNAL OF BIOGEOGRAPHY, Issue 1 2004Víctor Cussac Abstract Aim, The aim of this work is to update the distribution data of Galaxiidae in South America, relating extant distribution to physiological and reproductive characteristics of the species, latitude, temperature, and post-glacial opportunities for colonization. Location, Lakes and rivers of Patagonia. Methods, We compared, and eventually reconsidered, general data about distribution based on the original literature about capture sites, incorporating several published and unpublished data to the analysis of the biological traits and distribution of Galaxiidae. Results, The more consistent issue in the comprehension of galaxiid biogeography in South America is the ability to establish landlocked populations. Different founding events in landlocked populations of Galaxias maculatus suggest the possible existence of older and younger landlocked populations. This difference in the time since the establishment of lacustrine populations could have been expressed in their ability for colonization of post-glacial areas. Galaxias maculatus, Aplochiton and Brachygalaxias are more clearly excluded from the post-glacial area than G. platei. For all the species we could note a more abundant record of lake populations at the area of glacial refuges. It could be noted that the most successful species, Galaxias platei, is a specialized deep bottom dweller. Deep bottom dwelling helps to endure winter constraints and it appears to be an alternative to the colonization of the littoral and limnetic zones of post-glacial lakes, the prefered habitat of the other Patagonian fish species. Main conclusions, At the end of this process of post-glacial colonization, in the beginning of twentieth century, man introduced several salmonid species in Patagonia. In addition, antropogenic actions had its more recent consequences in global warming. Nowadays we were able to observe new localities for Brazilian fishes into the Austral Subregion and expect some changes in the distribution of Galaxiidae. Northern limits for all species and southern limits for landlocked G. maculatus, Brachigalaxias bullocki and Aplochiton zebra, could be displaced southward. Probably, the species less affected by the changes will be G. platei. These predictions could be accurately formulated using the model of B.J. Shuter & J.R. Post (1990) Transactions of the American Fisheries Society119, 314,336, when biological database on these species are completed. [source] Abuse, Torture, Frames, and the Washington PostJOURNAL OF COMMUNICATION, Issue 2 2010Douglas V. Porpora W. Bennett, R. Lawrence, and S. Livingston (2006, 2007) argue that the press,and the Washington Post in particular,acquiesced to Bush administration framing of the mistreatment of prisoners at Abu Ghraib. The administration, they say, framed the events as the isolated abuse of prisoners by "a few bad apples" unreflective of higher responsibility or administration policy. Absent,or near absent, Bennett et al. maintain, was a Post counterframe of the mistreatment as a systematic effect of high level policy, better captured by the word torture. Such pattern of framing, Bennett et al. conclude, supports the Indexing model of U.S. press behavior. This article shows that Bennett et al. understate the strength and consistency of Post counterframing. When articles in the Post are searched not for individual words but for more extended frames, it becomes clear that the Post did in fact engage in considerable counterframing even in the absence of elite political opposition. This case, it is therefore concluded, does not in fact support the Indexing model as Bennett et al. maintain but is rather the kind of case described by R. M. Entman (2004) in which the press exercises greater independence of elite political opinion than the Indexing model admits. W. Bennett, R. Lawrence et S. Livingston (2006, 2007) soutiennent que la presse , et en particulier le Washington Post, ont accepté le cadrage qu'a offert l'administration Bush des mauvais traitements infligés aux prisonniers d'Abou Ghraib. L'administration, disent-ils, a cadré les événements comme étant des actes isolés d'abus de prisonniers par quelques « pommes pourries », sans engager la responsabilité d'instances plus élevées ou de politiques administratives. Ce qui était absent (ou presque absent) des reportages, soutiennent Bennett et al., était un contre-cadrage par le Post des mauvais traitements comme étant plutôt un effet systématique des politiques de haut niveau, ce qui se reflète mieux dans le terme « torture ». Un tel cadrage, concluent Bennett et al., soutient le modèle d'indexation du comportement de la presse américaine. Cet article montre que Bennett et al. sous-estiment la force et la cohérence du contre-cadrage du Post. Lorsque l'on cherche, dans les articles du Post, des cadres plus étendus que des mots individuels, il devient clair que le Post a en fait réalisé un contre-cadrage considérable, même en l'absence d'opposition de la part de l'élite politique. Nous concluons donc que ce cas ne soutient pas le modèle d'indexation, comme Bennett et al. l'affirment, mais qu'il est plutôt du type de cas décrit par R. M. Entman (2004), un cas où la presse exerce une plus grande indépendance par rapport à l'opinion de l'élite politique que ne l'admet le modèle d'indexation. W. Bennett, R. Lawrence und S. Livingston (2006, 2007) argumentieren, dass die Presse , und insbesondere die Washington Post , das Framing der Bush-Regierung bezüglich der Misshandlung von Gefangenen in Abu Ghraib duldete. Die Regierung, so die Autoren, framte die Ereignisse als den isolierten Missbrauch von Gefangenen durch einige wenige und reflektierte dabei eben nicht die übergeordneten Verantwortlichkeiten oder die Verwaltungspolitik. Gänzlich oder fast gefehlt hat laut Bennett et al. ein Gegenframe der Post zum Missbrauch als ein systematischer Effekt übergeordneter Politik, welcher besser mit dem Wort Folter gefasst wäre. Derartige Framing-Muster, so Bennett et al., stützen das Indexing-Modell des Verhaltens der amerikanischen Presse. Vorliegender Artikel zeigt, dass Bennett et al. das Ausmaß und die Kontinuität des Gegenframings durch die Post unterbewerten. Durchsucht man die Artikel der Post nicht nur nach Einzelwörtern sondern nach erweiterten Frames, zeigt sich deutlich, dass die Post sehr wohl Counterframing betrieben hat, und das obwohl eine politische Elite-Opposition gefehlt hat. Dieser Fall stützt also das Indexing-Modell wie Bennett et al. es darstellen gerade nicht, sondern ist eher ein Fall wie R.M. Entman (2004) ihn beschreibt, in dem die Presse größere Unabhängigkeit von der politischen Elitemeinung äußert als das Indexing-Modell zulässt. Resumen W. Bennett, R. Lawrence, y S. Livingston (2006, 2007) sostienen que la prensa,y el Washington Post en particular,acordaron con la administración de Bush en el encuadre sobre el maltrato de los prisioneros de Abu Ghraib. La administración, dicen, encuadró los eventos como abusos aislados de los prisioneros por parte de ,,un par de manzanas podridas" acríticos de la responsabilidad superior o de las políticas de la administración. La ausencia,o casi ausencia, Bennett et al. sostienen, fue el contra-encuadre del Post sobre el maltrato como un efecto sistemático de las políticas de alto nivel, mejor capturado por la palabra tortura. Esa pauta de encuadre, Bennett et al. concluyen, apoya al modelo de Indexación del comportamiento de la prensa de los EE.UU. Este artículo muestra que Bennett et al. subestimaron la fuerza y la consistencia del contra-encuadre del Post. Cuando los artículos en el Post son buscados no por las palabras individuales sino por los encuadres más extendidos, resulta claro que el Post en realidad participa en contra-encuadres considerables aún en la ausencia de la oposición política de elite. Este caso, por lo tanto se concluye, que en realidad no apoya al modelo de Indexación que Bennett et al. sostienen pero es el tipo de caso descrito por R.M. Entman (2004) en el cual la prensa ejercita una gran independencia de la opinión política de elite que lo que admite el modelo de la Indexación. [source] Comparative Response to a Survey Executed by Post, E-mail, & Web FormJOURNAL OF COMPUTER-MEDIATED COMMUNICATION, Issue 1 2000Gi Woong Yun Recent developments in communication technologies have created alternative survey methods through e-mail and Web sites. Both methods use electronic text communication, require fewer resources, and provide faster responses than traditional paper and pencil methods. However, new survey methodologies also generate problems involving sampling, response consistency and participant motivation. Empirical studies need to be done to address these issues as researchers implement electronic survey methods. In this study we conduct an analysis of the characteristics of three survey response modes: post, e-mail, and Web site. Data are from a survey of the National Association of Science Writers (NASW), in which science writers' professional use of e-mail and the Web is evaluated. Our analysis offers two lessons. First, a caution. We detect a number of potentially important differences in the response characteristics of these three groups. Researchers using multi-mode survey techniques should keep in mind that subtle effects might be at play in their analyses. Second, an encouragement. We do not observe significant influences of survey mode in our substantive analyses. We feel, at least in this case, that the differences detected in the response groups indicate that using multi-mode survey techniques improved the representativeness of the sample without biasing other results. [source] The ZiReal Post: A New Ceramic Implant AbutmentJOURNAL OF ESTHETIC AND RESTORATIVE DENTISTRY, Issue 1 2003URS BRODBECK DMD ABSTRACT Restorations in the anterior esthetic zone present significant challenges in both the surgical and prosthetic phases of implant dentistry. Titanium has been established as the material of choice for endosseous implants, resulting in a high degree of predictability. Many types of implants require transmucosal abutments to retain implant restorations. Ceramics may be the ideal material to replace natural teeth, but most transmucosal abutments are made of titanium. However, ceramics may also be used as abutments in implant restorations. This combination of ceramics for abutment and crown provides better translucency for the implant restoration than is available with metal abutments and porcelain-fused-to-metal crowns. Ceramic abutments and implant restorations also minimize the gray color associated with metal components that is transmitted through the peri-implant tissues. Customized emergence profiles also may be obtained with ceramic abutments; this generally improves the predictability and consistency of the esthetics obtainable in implant restorations. Zirconia as a ceramic material offers not only outstanding material properties but also a well-documented biocompatibility. CLINICAL SIGNIFICANCE This article discusses the clinical and laboratory features of a new ceramic abutment, ZiRealÔ Post (Implant Innovations, Inc., Palm Beach Gardens, Florida). [source] Fracture Resistance of Endodontically Treated Teeth Restored with Three Different Prefabricated Esthetic PostsJOURNAL OF ESTHETIC AND RESTORATIVE DENTISTRY, Issue 1 2003PAULO C. A. MACCARI DDS ABSTRACT Purpose: This study was undertaken to evaluate the role of composition of prefabricated esthetic posts in fracture resistance of endodontically treated teeth in vitro. Materials and Methods: Thirty human, single-rooted teeth (maxillary central incisors and canines) with similar root dimensions, extracted for therapeutic reasons, were used in this study. The crowns were removed below the cementoenamel junction to obtain a standard root length of 17 mm. The roots were endodontically treated following the conventional manual technique and randomly assigned to three groups (n = 10) according to the post used: Aestheti-Post, Bisco, Schaumberg, Illinois; FibreKor Post, Jeneric/Pentron, Wallingford, Connecticut; and CosmoPost, Ivoclar Vivadent, Schaan, Liechtenstein. The root canals were rendered patent, and the root preparations were standardized through flaring with the manufacturers' drills included in the respective kits. The posts were cemented with an adhesive system and a resin cement (All-Bond 2 and C & B, Bisco, respectively), according to the manufacturers' directions. Composite resin (Tetric Ceram, Ivoclar Vivadent) crowns were built up using a preformed polyester matrix, and the specimens were mounted in metallic rings with cold-cure acrylic resin and kept in saline solution at 4°C for 24 hours. Fracture resistance was then determined using an EMIC DL-2000 universal testing machine. The crosshead speed was 0.5 mm/min with the 45-degree compressing load at the middle third of the crown. Data were analyzed using one-way analysis of variance and Tukey'stest (p<.001). Results: Mean fracture resistance was as follows: Aestheti-Post, 83.5 kgf; FibreKor Post, 85.7 kgf; and CosmoPost, 36.5 kgf. The fracture strength of CosmoPost was significantly lower than that of the other posts. Teeth restored with CosmoPost had post fractures, and in three specimens, those were associated with root fractures. Teeth restored with the other two posts presented fractures on the composite crowns. CLINICAL SIGNIFICANCE Compared with ceramic posts, carbon-fiber and glass-fiber prefabricated esthetic posts provide endodontically treated teeth higher fracture resistance. [source] All-Ceramic Post, Core, and Crown: Technique and Case ReportJOURNAL OF ESTHETIC AND RESTORATIVE DENTISTRY, Issue 5 2001GUILHERME CARPENA LOPES DDS [source] A Systematic Review of Dowel (Post) and Core Materials and SystemsJOURNAL OF PROSTHODONTICS, Issue 6 2009Joanna N. Theodosopoulou DDS Abstract Purpose: The aim of this systematic review was to determine which dowel (post) and core system is the most successful when used in vivo to restore endodontically treated teeth. Materials and Methods: A MEDLINE, a Cochrane, and an EMBASE search (three specified searches) were conducted to identify randomized (RCT) and nonrandomized controlled clinical trials (CCT), cohort (CS), and case control studies (CCS) until January 2008, conducted on humans, and published in English, German, and French, relating to dowel and core systems for restoring endodontically treated teeth. Also, a hand search was conducted, along with contact with the authors when needed. Results: The MEDLINE, Cochrane, and EMBASE searches identified 997, 141, and 25 published articles, respectively. Ten articles from the MEDLINE and seven articles from the Cochrane search (that were also identified in the MEDLINE search) met the inclusion and validity assessment criteria. Six out of the ten studies were RCTs, two were CCTs, and two CSs. The RCT studies suggest that carbon fiber in resin matrix dowels are significantly better than precious alloy cast dowels (number needed to treat, NNT = 8.30). Tapered gold alloy cast dowels are better than ParaPost® gold alloy cast dowels (NNT = 13.15). ParaPost® prefabricated dowels are slightly better than ParaPost® cast dowels (NNT = 175.4). Glass fiber dowels are significantly better than metal screw dowels (NNT = 5.46), but worse than titanium (NNT =,21.73) (moderately). Carbon fiber dowels are worse than gold alloy cast dowels (significantly) (NNT =,5.81) and than amalgam dowels (NNT =,125) (slightly). The CCT studies suggest that metal dowels are better (NNT = 21.73) but also worse than cast dowels (NNT =,33.33) depending on the remaining amount of coronal hard tissue. Quartz fiber dowels show success rates similar to and worse than glass fiber-reinforced dowels (NNT =,37.03). The results from the CS studies suggest that carbon fiber in resin matrix dowels are better (moderately) than carbon fiber + quartz and quartz fiber dowels. Titanium dowels with a composite build-up are better (moderately) than gold alloy cast dowels. Conclusions: According to the studies of the highest levels of evidence, carbon fiber in resin matrix dowels are significantly better than precious alloy cast dowels (RCT). Glass fiber dowels are significantly better than metal screw dowels (RCT) and moderately better than quartz fiber dowels (CCT). Carbon fiber dowels are significantly worse than metal dowels (of precious alloy) (RCT). Prefabricated metal dowels are slightly better than cast dowels (RCT), but moderately worse when no collar of the dentin above the gingiva could be achieved (CCT). [source] The Effect of Dowel Space on the Bond Strengths of Fiber PostsJOURNAL OF PROSTHODONTICS, Issue 3 2007Jorge Perdigão DMD Purpose: The purpose of this study was to evaluate the effect of the degree of mismatch between post space and post diameters on the bond strength of a fiber-reinforced resin post. Materials and Methods: Thirty-two extracted human maxillary central incisors and canines were endodontically treated and assigned to four groups: Group 1 - Canal prepared with a D.T. Light Post #1 drill (control); Group 2 - Canal prepared with a D.T. Light Post #2 drill; Group 3 - Canal prepared with a D.T. Light Post #3 drill; Group 4 - Canal prepared with a Gates Glidden #6 drill. A D.T. Light Post size 1 was then luted into the canal using One-Step Adhesive and Post Cement Hi-X. A push-out test was performed on three sections of each root to measure push-out bond strengths. Data were analyzed with ANOVA and Bonferroni's test at p < 0.05. Two extra teeth for each group were restored in the same fashion and processed for SEM observation. Results: (in MPa): Group 1: 15.7 ± 6.9; Group 2: 14.7 ± 6.5; Group 3: 14.0 ± 5.0; Group 4: 14.0 ± 5.1. The variable "post space" resulted in no statistically significant difference in mean bond strengths (p > 0.05). For the variable "root region," the coronal third (17.5 ± 6.0) resulted in statistically greater mean bond strengths than the apical third (12.3 ± 6.0) at p < 0.008. The middle third (14.0 ± 5.3) resulted in no statistically significant different mean bond strengths from the coronal third at p > 0.119 and from the apical third at p > 0.999. Under the SEM, some areas of the canal system still displayed residual gutta-percha, which resulted in debonding of the interface between the resin cement and dentin. Areas with incomplete dentin hybridization were observed in localized areas of all groups. Conclusions: The diameter of the post space did not affect the push-out bond strengths. Bonding at the coronal level of the root canal is more reliable than bonding at the apical level. The presence of residual gutta-percha and the deficient dentin hybridization may result in deficient seal of the resin,dentin interface. [source] Pierson v. Post: A Great Debate, James Kent, and the Project of Building a Learned Law for New York StateLAW & SOCIAL INQUIRY, Issue 2 2009Angela Fernandez Pierson v. Post (1805) has long puzzled legal teachers and scholars. This article argues that the appellate report was the product of the intellectual interests (and schooling) of the lawyers and judges involved in the case. They converted a minor dispute about a fox into a major argument in order to argue from Roman and other civil law sources on how to establish possession in wild animals, effectively crafting an opportunity to create new law for New York State. This article explores the possibility that the mastermind behind this case was the chief justice of the court at the time, James Kent. The question of Kent's involvement in 1805 remains elusive. However, the article uses annotations he made on his copy of the case and discussion of Pierson v. Post in his famous Commentaries to demonstrate the nature of his later interest and to explore the project of building a learned law for New York State. [source] | ||||||||||||||||||||||||||||||||||||||||||||||||||||