bluuebunny/crossref_metadata_2025_split huggingface dataset:
Is Self‐Esteem a Cause or Consequence of Social Support? A 4‐Year Longitudinal Study
Authors: Marshall Sarah L. , Parker Phillip D. , Ciarrochi Joseph , Heaven Patrick C.L. 
Published: October 2013

Considerable research has been devoted to examining the relations between self‐esteem and social support. However, the exact nature and direction of these relations are not well understood. Measures of self‐esteem, and social support quantity and quality were administered to 961 adolescents across five yearly time points (Mage = 13.41 years). Structural equation modeling (SEM) was utilized to test between a self‐esteem antecedent model (self‐esteem precedes changes in social support), self‐esteem consequence model (social support precedes change in self‐esteem), and a reciprocal influence model. Self‐esteem reliably predicted increasing levels of social support quality and network size across time. In contrast, the consequence model was not supported. The implications of this for helping adolescents to develop higher quality social support structures are discussed.
Children's Norm Enforcement in Their Interactions With Peers
Authors: Köymen Bahar , Lieven Elena , Engemann Denis A. , Rakoczy Hannes , Warneken Felix , Tomasello Michael 
Published: October 2013

This study investigates how children negotiate social norms with peers. In Study 1, 48 pairs of 3‐ and 5‐year‐olds (N = 96) and in Study 2, 48 pairs of 5‐ and 7‐year‐olds (N = 96) were presented with sorting tasks with conflicting instructions (one child by color, the other by shape) or identical instructions. Three‐year‐olds differed from older children: They were less selective for the contexts in which they enforced norms, and they (as well as the older children to a lesser extent) used grammatical constructions objectifying the norms (“It works like this” rather than “You must do it like this”). These results suggested that children's understanding of social norms becomes more flexible during the preschool years.
Echocardiographic Evaluation of External Iliac Artery Doppler Waveform in Patients with Coronary Artery Disease
Authors: Styczynski Grzegorz , Szmigielski Cezary , Kaczynska Anna , Kuch‐Wocial Agnieszka 
Published: October 2013

Visual interpretation of the Doppler waveform in the common femoral or distal external iliac artery (EIA) was reported to be useful in screening for proximal peripheral artery occlusive disease (PAOD) in patients with lower limb ischemia. Commonly patients with coronary artery disease (CAD) referred for echocardiography have coexistent arterial pathology. Therefore, we decided to study whether echocardiographic evaluation of the distal EIA flow can be useful for detection of PAOD in patients with CAD. We studied 150 consecutive patients (pts) with CAD referred for echocardiography. At the end of an echocardiographic examination, evaluation of the flow in the distal EIA with an echocardiographic probe was performed. The Doppler waveform was classified as normal—with early diastolic flow reversal or abnormal–without early diastolic flow reversal. Echocardiographic findings were compared in a blinded fashion with the results of the ankle brachial index measurements (ABI). Based on the ABI ≤ 0.9, peripheral artery disease was diagnosed in 54 pts (36%) and abnormal external iliac Doppler waveform was found in 27 pts (18%). Sensitivity of abnormal external iliac Doppler waveform in predicting PAOD was 48%, specificity 99%, positive predictive value (PPV) 96%, and negative predictive value 77%. Peripheral arterial occlusive disease is common in patients with CAD referred for echocardiographic study. Echocardiographic assessment of distal EIA Doppler waveform has low sensitivity, but high specificity and high PPV in the diagnosis of peripheral arterial occlusive disease.
Two‐Dimensional Speckle Tracking–Derived Strain to Distinguish Acute Coronary Syndrome from a Marked Early Repolarization in a Patient with Chest Pain: A Fancy Gadget or a Useful Tool?
Authors: Stankovic Ivan , Cvorovic Vojkan , Putnikovic Biljana , Vuksanovic Ivica , Panic Milos , Neskovic Aleksandar N. 
Published: October 2013

BackgroundWith a potential of detecting subtle myocardial injury, two‐dimensional (2D) speckle tracking–derived strain could help to distinguish between ischemic and nonischemic ST‐segment elevation. Little is known if limitations of strain imaging could prevent its applicability in acute cardiac care settings.Case PresentationWe present a 56‐year‐old male with persistent ST‐segment elevation in the inferolateral leads and suspected hypokinesia of the inferior wall. Semiautomated 2D speckle tracking strain analysis showed normal longitudinal peak systolic strain (LPSS) in all segments of the inferior wall, ruling out wall‐motion abnormalities in this region. Stationary reverberations and spuriously low values of LPSS in the posterolateral wall required operator's expertise to distinguish pathological myocardial deformation from artifacts. Additional workup revealed that early repolarization pattern was mistaken for the inferior wall acute myocardial infarction in our patient.ConclusionsSemiautomated quantification of regional left ventricular function by 2D speckle tracking echocardiography could facilitate decision making even in the emergency settings. Due to intrinsic limitations of this novel method, its actual clinical value in acute cardiac care settings may depend on the expertise of the operator and is yet to be determined.
Objective Measures of Right Ventricular Function during Exercise: Results of a Pilot Study
Authors: Anjak Ahmad , López‐Candales Angel , Lopez Francisco R. , Harris David , Elwing Jean 
Published: October 2013

BackgroundA growing body of evidence seems to suggest that reduction in right ventricular (RV) systolic function is not only associated with both development of symptoms associated with pulmonary arterial hypertension (PAH) but also increased morbidity and adverse clinical outcomes. Recent data suggest that supine bicycle stress echocardiography (sBEE) is feasible and provides realistic resistance and compliance estimations.MethodsThe study design was a retrospective analysis of sBEE obtained for clinical indications of dyspnea on exertion or unexplained exercise intolerance. A total of 30 sBEE studies were included. The first 10 sBEE studies served as a calibration cohort not only to establish objective measures of RV performance but also to determine feasibility and reproducibility. The following 20 sBEE served as a validation cohort.ResultsOur results demonstrate that tricuspid annular plane systolic excursion and tricuspid annular systolic velocity, even when measured by an untrained reader, are reliable and accurate measures of the RV response to exercise during a sBEE protocol. Furthermore, measurements of RV myocardial performance (Tei index) or peak RV strain during exercise not only are time consuming but also simply unreliable and should not be utilized to evaluate RV function during sBEE.ConclusionThe results of our pilot study suggest that sBEE might be promising for detecting RV abnormalities during exercise. A larger prospective study is now needed to determine if TAPSE and tricuspid annular systolic velocity recorded during sBEE might be useful in assessing patients presenting with dyspnea during exercise or suspected of having PAH.
Right Ventricular Ejection Efficiency: A New Echocardiographic Measure of Mechanical Performance in Chronic Pulmonary Hypertension
Authors: López‐Candales Angel , Lopez Francisco R. , Trivedi Setu , Elwing Jean 
Published: October 2013

BackgroundThe severity of pulmonary vascular resistance (PVR) is known to be a critical determinant of right ventricular (RV) systolic function; this relationship remains poorly characterized. We therefore, designed a study to examine the relationship that exists between echocardiographically measured PVR and maximal tricuspid annular plane systolic excursion (TAPSE) to gain some insight regarding RV ejection efficiency (RVEe) in patients with chronic pulmonary hypertension (cPH).MethodsStandard echocardiographic measures of RV size and systolic performance were recorded from 95 patients (age 54 ± 15 years and pulmonary artery systolic pressures [PASP] that range from 20 to 125 mmHg). For this study, RVEe was defined as TAPSE/Echocardiographic PVR.ResultsA strong negative correlation (R2 = −0.51, P < 0.001) was seen between TAPSE and PASP; however, a power curve trend line fit the relationship between RVEe and PASP (R2 = 0.77; P < 0.01). In a multiple regression analysis, abnormal pulmonary pressures were better identified when RVEe (P < 0.0001) was used.ConclusionsBased on these results, it appears that measurement of RVEe might be extremely useful for the assessment of RV mechanics and plasticity. The power curve relationship clearly demonstrates that minimal changes in PASP (up to 50 mmHg) result in dramatic reductions in RVEe. A steady decline in RVEe, though at a lower rate, continues to occur with increasing PASP. Additional studies are required using RVEe into a functional RV imaging algorithm and determine if RVEe correlates with development of symptoms, response to therapy and overall clinical outcomes.
Framing Classroom Discussion of Same‐Sex Marriage
Authors: Hand Michael 
Published: October 2013

AbstractAssuming that the issue of same‐sex marriage should be discussed in schools, how should the discussion be framed? Michael Hand first distinguishes this question from the related but distinct question of whether discussion on this topic should be steered. He then examines three possible frames for discussion of same‐sex marriage: the perfectionist frame, the antiperfectionist frame, and the practical accommodation frame. He defends the perfectionist frame over the two alternatives: the purpose of state involvement in marriage is to promote valuable forms of intimate relationship, so the case for enabling same‐sex couples to marry turns on the ethical claim that same‐sex and opposite‐sex intimate relationships are similarly valuable. Interrogation of this ethical claim must be central to classroom discussion of same‐sex marriage.
The Democratic Imperative to Address Sexual Equality Rights in Schools
Authors: Gereluk Dianne 
Published: October 2013

AbstractIssues of sexual orientation elicit ethical debates in schools and society. In jurisdictions where a legal right has not yet been established, one argument commonly rests on whether schools ought to address issues of same‐sex relationships and marriage on the basis of civil equality, or whether such controversial issues ought to remain in the private sphere. Drawing upon an antiperfectionist liberal framework, Dianne Gereluk argues that schools have an obligation to educate students in two important ways. First, students must develop an awareness and understanding of the range of acceptable and permissible ways of life that may lead to human flourishing. Second, students must understand the requisite protections and recognition afforded to individuals in a pluralist society.
Reason, Liberalism, and Democratic Education: A Deweyan Approach to Teaching About Homosexuality
Authors: Petrovic John E. 
Published: October 2013

AbstractTeaching about homosexuality, especially in a positive light, has long been held to be a controversial issue. There is, however, a view of the capacity for reason that finds that those who deem homosexuality to be controversial will ultimately contradict themselves, becoming unreasonable. By this standard of reason, homosexuality should be treated as non controversial in schools. In this essay, John Petrovic argues that this epistemic position is problematic. Instead, he defends a Deweyan epistemology that casts reason as, in part, a set of socially acquired habits of mind. People who have been socialized into heterosexist habits of mind must be exposed to counterhegemonic discourses. One such discourse can be found in the public values of liberal democracy through which the practice of reason must be pursued. Petrovic discusses the practical guidance provided by assuming a view of normative reason versus habituated reason in terms of both pedagogy and curriculum.
The origin of projections from the posterior cingulate and retrosplenial cortices to the anterior, medial dorsal and laterodorsal thalamic nuclei of macaque monkeys
Authors: Aggleton John P. , Saunders Richard C. , Wright Nicholas F. , Vann Seralynne D. 
Published: October 2013

AbstractInteractions between the posterior cingulate cortex (areas 23 and 31) and the retrosplenial cortex (areas 29 and 30) with the anterior, laterodorsal and dorsal medial thalamic nuclei are thought to support various aspects of cognition, including memory and spatial processing. To detail these interactions better, the present study used retrograde tracers to reveal the origins of the corticothalamic projections in two closely related monkey species (Macaca mulatta, Macaca fascicularis). The medial dorsal thalamic nucleus received only light cortical inputs, which predominantly arose from area 23. Efferents to the anterior medial thalamic nucleus also arose principally from area 23, but these projections proved more numerous than those to the medial dorsal nucleus and also involved additional inputs from areas 29 and 30. The anterior ventral and laterodorsal thalamic nuclei had similar sources of inputs from the posterior cingulate and retrosplenial cortices. For both nuclei, the densest projections arose from areas 29 and 30, with numbers of thalamic inputs often decreasing when going dorsal from area 23a to 23c and to area 31. In all cases, the corticothalamic projections almost always arose from the deepest cortical layer. The different profiles of inputs to the anterior medial and anterior ventral thalamic nuclei reinforce other anatomical and electrophysiological findings suggesting that these adjacent thalamic nuclei serve different, but complementary, functions supporting memory. While the lack of retrosplenial connections singled out the medial dorsal nucleus, the very similar connection patterns shown by the anterior ventral and laterodorsal nuclei point to common roles in cognition.
Integrating the ‘genomic mosaic’ view of species into studies of biotic interactions: a comment on Bernhardsson et al. ()
Authors: Lexer Christian , Caseys Celine , Stritt Christoph , Whitham Thomas G. 
Published: October 2013

AbstractThe co‐occurrence of geographical structure in herbivore communities, metabolomes and defence genes in forest trees has been analysed in the context of ‘geographical mosaics’ of coevolution. A deeper understanding of these important issues will require full integration of a ‘genomic mosaic’ view of species into community ecology.
Regional thalamic neuropathology in patients with hippocampal sclerosis and epilepsy: A postmortem study
Authors: Sinjab Barah , Martinian Lillian , Sisodiya Sanjay M. , Thom Maria 
Published: October 2013

SummaryPurposeClinical, experimental, and neuroimaging data all indicate that the thalamus is involved in the network of changes associated with temporal lobe epilepsy (TLE), particularly in association with hippocampal sclerosis (HS), with potential roles in seizure initiation and propagation. Pathologic changes in the thalamus may be a result of an initial insult, ongoing seizures, or retrograde degeneration through reciprocal connections between thalamic and limbic regions. Our aim was to carry out a neuropathologic analysis of the thalamus in a postmortem (PM) epilepsy series, to assess the distribution, severity, and nature of pathologic changes and its association with HS.MethodsTwenty‐four epilepsy PM cases (age range 25–87 years) and eight controls (age range 38–85 years) were studied. HS was classified as unilateral (UHS, 11 cases), bilateral (BHS, 4 cases) or absent (No‐HS, 9 cases). Samples from the left and right sides of the thalamus were stained with cresyl violet (CV), and for glial firbillary acidic protein (GFAP) and synaptophysin. Using image analysis, neuronal densities (NDs) or field fraction staining values (GFAP, synaptophysin) were measured in four thalamic nuclei: anteroventral nucleus (AV), lateral dorsal nucleus (LD), mediodorsal nucleus (MD), and ventrolateral nucleus (VL). The results were compared within and between cases.Key FindingsThe severity, nature, and distribution of thalamic pathology varied between cases. A pattern that emerged was a preferential involvement of the MD in UHS cases with a reduction in mean ND ipsilateral to the side of HS (p = 0.05). In UHS cases, greater field fraction values for GFAP and lower values for synaptophysin and ND were seen in the majority of cases in the MD ipsilateral to the side of sclerosis compared to other thalamic nuclei. In addition, differences in the mean ND between classical HS, atypical HS, and No‐HS cases were noted in the ipsilateral MD (p < 0.05), with lower values observed in HS.SignificanceOur study demonstrates that stereotypical pathologic changes, as seen in HS, are not clearly defined in the thalamus. This may be partly explained by the heterogeneity of our PM study group. With quantitation, there is some evidence for preferential involvement of the MD, suggesting a potential role in TLE, which requires further investigation.
Malformation in index pregnancy in women with epilepsy is not followed by recurrence in subsequent pregnancy
Authors: Begum Shehanaaz , Sarma Sankara P. , Thomas Sanjeev V. 
Published: October 2013

SummaryUse of antiepileptic drugs (AEDs) in pregnant women with epilepsy (WWE) is associated with an increased risk of major congenital malformations (MCM). Previous studies have suggested that WWE who had a malformation in their index pregnancy were at an increased risk of recurrence in future pregnancies. We aimed to assess the risk of recurrence of MCM in 1,616 WWE from Kerala Registry of Epilepsy and Pregnancy. The pregnancy outcome of women (n = 246) with two prospective pregnancies in the registry were analyzed. They had partial seizures with or without generalization (57.3%) or generalized seizures (42.7%). Polytherapy was used in 26.4% (index pregnancy) and 23.6% (follow‐up pregnancy). The mean dosage of AED for valproate was 498 mg/day and carbamazepine was 555 mg/day. The malformation rate in the index pregnancy was 8.5% (21/246) and in the follow‐up pregnancy was 8.9% (22/246) with only one recurrence. There was no increased risk of MCM in follow‐up pregnancy for those who had MCM in the index pregnancy (p = 0.70; OR 0.49; 95% CI 0.06–3.80). The use of any specific drug, continuation of the same drug or a change in drug therapy between two pregnancies did not alter the recurrence risk.
What predicts the use by brook trout (Salvelinus fontinalis) of terrestrial invertebrate subsidies in headwater streams?
Authors: Wilson Matthew K. , Lowe Winsor H. , Nislow Keith H. 
Published: October 2013

Summary

Spatial subsidies are important resources for organisms in receiving habitats, particularly when production in those habitats is low. Terrestrial invertebrates provide a critical subsidy for trout, including eastern brook trout (Salvelinus fontinalis), but we have limited understanding of what causes input and use of these subsidies to vary among streams.

We predicted that forest successional stage would be an especially important driver of variation in terrestrial invertebrate subsidies to brook trout in headwater streams due to differences in terrestrial invertebrate biomass in early and late successional habitats. Specifically, we expected biomass of aerial invertebrates, those capable of dispersal to the stream, to be greater in early successional habitat than late successional habitat due to the nutrient‐rich, herbaceous vegetation typical of early successional habitat.

We measured aerial terrestrial invertebrate biomass in early and late successional habitats, input to streams and use by resident brook trout in 12 first‐ and second‐order catchments in northern New Hampshire, U.S.A. The study catchments represented a range of early successional habitat coverage (0–51.5%). We also measured a suite of reach‐scale variables that might influence terrestrial invertebrate input and use by brook trout, including riparian forest conditions and benthic invertebrate biomass.

Within study catchments, aerial terrestrial invertebrate biomass and abundance were significantly higher in early successional habitats than late successional habitats. However, terrestrial invertebrate input to streams and use by brook trout were unrelated to per cent early successional habitat in the catchment, and to other catchment and riparian forest characteristics. These results indicate that the management for upland early successional habitat has little effect on terrestrial invertebrate subsidies to headwater streams and fish.

Surprisingly, benthic invertebrate biomass was the one significant predictor of per cent terrestrial invertebrates in brook trout diets. Use of terrestrial invertebrate subsidies declined with increasing benthic invertebrate biomass, suggesting that productivity in the aquatic environment influences the degree to which brook trout use terrestrial subsidies. Although subsidy inputs are controlled by the donor system, this study shows that use of these subsidies by consumers can be determined by conditions in the recipient habitat.
How social media transform migrant networks and facilitate migration
Authors: DEKKER RIANNE , ENGBERSEN GODFRIED 
Published: October 2013

AbstractWe argue that social media are not only new communication channels in migration networks, but also that they actively transform the nature of these networks and thereby facilitate migration. Despite some limitations, which stem from the ‘digital divide’ and the lower trustworthiness of virtual ties, qualitative data reveal four relevant ways in which social media facilitate international migration. First, they enhance the possibilities of maintaining strong ties with family and friends. Second, they address weak ties that are relevant to organizing the process of migration and integration. Third, they establish a new infrastructure consisting of latent ties. Fourth, they offer a rich source of insider knowledge on migration that is discrete and unofficial. This makes potential migrants ‘streetwise’ when undertaking migration. Based on these empirical findings we conclude that social media are transforming migration networks and thereby lowering the threshold for migration.
Navigating return: the gendered geographies of skilled return migration to Ghana
Authors: WONG MADELEINE 
Published: October 2013

AbstractIn this article, I extend the literature on return migration by exploring the gendered mechanisms of return for highly skilled Ghanaian migrants. Drawing on interviews with Ghanaian women and men who returned in their prime productive years, I examine their decision‐making, the strategies they implement and the challenges they negotiate in the process. While the decision to return was straightforward, the actual processes circumscribing it contained tensions and compromises that involved renegotiations of gender identities, roles and norms, which themselves intersected with class differences. The empirical analyses emphasize how skilled migrants capitalize on their class status, social networks and transnational activities as means not only to return but also, for some, to mitigate the impacts of separation for themselves and their families as they seek to accomplish specific goals.