Miracle-dz/UniFAR-FTUs huggingface dataset:
And Still They Dance: Women, War and the Struggle for Change in Mozambique

book. It is a compilation of citations from Library Literature, Library Science Abstracts and Library and Information Science Abstracts arranged in five general sections, each with subdivisions: "Africa in General," "Africana Collections," "Inter-Regional and Regional, International Meetings 1953-1984" and "Countries. " The citations for large countries are in turn subdivided by type of library. Approximately 2,700 titles are included in the bibliography. Titles are double listed if they pertain to more than one topic outside an individual country. Articles, books, pamphlets and conference papers are included, but book reviews are excluded. The compilation of these citations in a single source is an important contribution to the bibliography of African librarianship. Sitzman acknowledges the problems of bibliographic control over African library publications and finds it "distressing to know that some important publications may never be included in indexes or bibliographies" (p. 261). As indicated in the review of part three, a substantial number of publications are not included in the indexes Sitzman use to compile this bibliography. Had he also used national bibliographies and library accessions lists and such indexes as Africa Index and the International African Bibliography, he would have found additional citations. However, it would not have been feasible for one person to do this in a reasonable period of time. Nevertheless, Sitzman should have mentioned the kinds of sources not included in his bibliography to place it in the general context of literature on African librarianship. The only index to the bibliography is the author index to the whole book. The bibliography would be easier to use if it included a detailed subject index, as would the entire book. When Sitzman updates the bibliography in Advances in Library Administration and Organization, one hopes he will include both subject and author indexes. African Libraries covers topics of great potential interest, especially to librarians and educators. However, because of the major weaknesses mentioned in this review, it is a dangerous book to put in the hands of generalists unfamiliar with the parameters of the topics discussed. Specialists in African studies will be able to recognize its shortcominigs and know which sources to consult for additional and in some cases more authoritative information.
Filters in 2D and 3D Cardiac SPECT Image Processing

Nuclear cardiac imaging is a noninvasive, sensitive method providing information on cardiac structure and physiology. Single photon emission tomography (SPECT) evaluates myocardial perfusion, viability, and function and is widely used in clinical routine. The quality of the tomographic image is a key for accurate diagnosis. Image filtering, a mathematical processing, compensates for loss of detail in an image while reducing image noise, and it can improve the image resolution and limit the degradation of the image. SPECT images are then reconstructed, either by filter back projection (FBP) analytical technique or iteratively, by algebraic methods. The aim of this study is to review filters in cardiac 2D, 3D, and 4D SPECT applications and how these affect the image quality mirroring the diagnostic accuracy of SPECT images. Several filters, including the Hanning, Butterworth, and Parzen filters, were evaluated in combination with the two reconstruction methods as well as with a specified MatLab program. Results showed that for both 3D and 4D cardiac SPECT the Butterworth filter, for different critical frequencies and orders, produced the best results. Between the two reconstruction methods, the iterative one might be more appropriate for cardiac SPECT, since it improves lesion detectability due to the significant improvement of image contrast.
Teaching Multistep Equations with Virtual Manipulatives to Secondary Students with Learning Disabilities

Students with learning disabilities often struggle with the academic demands presented in secondary mathematics curricula. To combat these students’ struggles, researchers have studied various pedagogical practices and classroom technologies for teaching standards covered in subjects such as algebra and geometry. However, as the role of computer– and tablet–based technologies in education grows, some areas of study, such as the use of virtual manipulatives, lack exploration. This study sought to assess the benefits of virtual manipulatives to teach secondary students with a learning disability in mathematics how to solve multistep algebraic equations. A multiple baseline design across three participants demonstrated a functional relation between the use of a virtual manipulative balance and teaching students to acquire, maintain, and generalize the skill of solving multistep algebraic equations. Results provide new evidence demonstrating virtual manipulatives as a beneficial age–appropriate technology to teach higher order mathematical concepts to secondary students with a learning disability.
Negative-tension branes and tensionless (1/2) brane in boundary conformal field theory

In the framework of boundary conformal field theory we consider a flat unstable Dp-brane in the presence of a large constant electromagnetic field. Specifically, we study the case that the electromagnetic field satisfy the following three conditions: (i) a constant electric field is turned on along the x{sup 1} direction (E{sub 1}{ne}0); (ii) the determinant of the matrix ({eta}+F) is negative so that it lies in the physical region (-det({eta}+F)>0); (iii) the 11-component of its cofactor is positive to the large electromagnetic field. In this case, we identify exactly marginal deformations depending on the spatial coordinate x{sup 1}. They correspond to tachyon profiles of hyperbolic sine, exponential, and hyperbolic cosine types. Boundary states are constructed for these deformations by utilizing T-duality approach and also by directly solving the overlap conditions in BCFT. The exponential type deformation gives a tensionless half brane connecting the perturbative string vacuum and one of the true tachyon vacua, while the others have negative tensions. This is in agreement with the results obtained in other approaches.
From Open Doors to Closed Gates: Intragenerational Reverse Incorporation in New Immigrant Destinations

Existing paradigms of immigrant incorporation fruitfully describe immigrants’ upward or downward mobility across generations. Yet we know very little about intragenerational change. Drawing on a case in which upwardly mobile Latino immigrants see their gains reversed, I model what I call intragenerational reverse incorporation. In doing so, I theorize how incorporation gains can be undone through institutional closure and shifts in reception attitudes spurred by securitization and intensified immigration enforcement. Drawing on data gathered in Winston-Salem, North Carolina, I show how these changes both marginalized and racialized Latino immigrants, who in turn internalized and politicized their new status.
Understanding current causes of women's underrepresentation in science

Explanations for women's underrepresentation in math-intensive fields of science often focus on sex discrimination in grant and manuscript reviewing, interviewing, and hiring. Claims that women scientists suffer discrimination in these arenas rest on a set of studies undergirding policies and programs aimed at remediation. More recent and robust empiricism, however, fails to support assertions of discrimination in these domains. To better understand women's underrepresentation in math-intensive fields and its causes, we reprise claims of discrimination and their evidentiary bases. Based on a review of the past 20 y of data, we suggest that some of these claims are no longer valid and, if uncritically accepted as current causes of women's lack of progress, can delay or prevent understanding of contemporary determinants of women's underrepresentation. We conclude that differential gendered outcomes in the real world result from differences in resources attributable to choices, whether free or constrained, and that such choices could be influenced and better informed through education if resources were so directed. Thus, the ongoing focus on sex discrimination in reviewing, interviewing, and hiring represents costly, misplaced effort: Society is engaged in the present in solving problems of the past, rather than in addressing meaningful limitations deterring women's participation in science, technology, engineering, and mathematics careers today. Addressing today's causes of underrepresentation requires focusing on education and policy changes that will make institutions responsive to differing biological realities of the sexes. Finally, we suggest potential avenues of intervention to increase gender fairness that accord with current, as opposed to historical, findings.
Uncinate fasciculus findings in schizophrenia: a magnetic resonance diffusion tensor imaging study.

OBJECTIVE Disruptions in connectivity between the frontal and temporal lobes may explain some of the symptoms observed in schizophrenia. Conventional magnetic resonance imaging (MRI) studies, however, have not shown compelling evidence for white matter abnormalities, because white matter fiber tracts cannot be visualized by conventional MRI. Diffusion tensor imaging is a relatively new technique that can detect subtle white matter abnormalities in vivo by assessing the degree to which directionally organized fibers have lost their normal integrity. The first three diffusion tensor imaging studies in schizophrenia showed lower anisotropic diffusion, relative to comparison subjects, in whole-brain white matter, prefrontal and temporal white matter, and the corpus callosum, respectively. Here the authors focus on fiber tracts forming temporal-frontal connections. METHOD Anisotropic diffusion was assessed in the uncinate fasciculus, the most prominent white matter tract connecting temporal and frontal brain regions, in 15 patients with chronic schizophrenia and 18 normal comparison subjects. A 1.5-T GE Echospeed system was used to acquire 4-mm-thick coronal line-scan diffusion tensor images. Maps of the fractional anisotropy were generated to quantify the water diffusion within the uncinate fasciculus. RESULTS Findings revealed a group-by-side interaction for fractional anisotropy and for uncinate fasciculus area, derived from automatic segmentation. The patients with schizophrenia showed a lack of normal left-greater-than-right asymmetry seen in the comparison subjects. CONCLUSIONS These findings demonstrate the importance of investigating white matter tracts in vivo in schizophrenia and support the hypothesis of a disruption in the normal pattern of connectivity between temporal and frontal brain regions in schizophrenia.
A critique of the use of the Kolmogorov‐Smirnov (KS) statistic for the analysis of BOLD fMRI data

The use of the Kolmogorov‐Smirnov (KS) statistic for testing hypotheses regarding activation in blood oxygenation level‐dependent functional MRI data is critiqued on both theoretical and empirical grounds. Theoretically, it is argued that the KS test is formally unable to support inferences of interest to most neuro‐imaging studies and has reduced sensitivity compared with parametric alternatives. Empirically, false‐positive rates yielded by the KS test in human data collected under the null hypothesis were significantly in excess of tabular values. These excessive false‐positive rates could be explained by the presence of temporal autocorrelation. We also present evidence that the distribution of blood oxygenation level‐dependent functional MRI data is only slightly nonnormal, questioning the initial impetus for the use of the KS test in this context. Finally, it is noted that parametric alternatives exist that do provide adequate control of the false‐positive rate and can support inferences of interest.
An Exploratory Analysis of Seven Child Welfare Workers who Confused SIDS with Child Maltreatment Fatalities: A Brief Research Report

Abstract Previous research shows that child welfare workers (CWWs) have low levels of knowledge of risk factors for child maltreatment fatalities. Further, these gaps in knowledge leave CWWs with misconceptions about causes of deaths and the characteristics of the perpetrators. This brief research report focuses on CWWs’ gaps in knowledge with regard to CMFs and sudden infant death syndrome (SIDS) and explores the socio-demographic characteristics of seven workers who confused fatal child maltreatment and SIDS. These workers were experienced professionals—who were in their middle-age, mid-career, and well-educated—and had been trained in how to recognize risk factors for CMFs. Implications for training and collaboration with other professionals are discussed, as well as the need for research to evaluate training efficacy.
Corporate Diversification and Performance : Evidence from Swedish Conglomerate and Non-Conglomerate Acquisitions

We study the shortand long-term valuation effects of Swedish takeovers. Using a sample of 93 bidding firms that acquired 101 targets between 1980 and 1995, we find that diversifying acquisitions lead to a negative market reaction and deterioration of the operating performance of the bidder. Announcement and performance gains in each of the three years following the acquisition occur only when bidders expand their core than their peripheral lines of business. Our findings suggest that focused acquisitions lead to greater synergies and operating efficiencies than diversifying acquisitions. Intra-group acquisitions, however, show that bidders do not realize significant gains whether they adopt diversifying or focusing investment strategies by purchasing firms controlled by the Wallenbergs and SHB conglomerate groups. Intra-group targets realize significant gains regardless bidder’s investment strategy. JEL classification: G34
Targeting Mitochondrial Dysfunction with L-Alpha Glycerylphosphorylcholine

Background We hypothesized that L-alpha-glycerylphosphorylcholine (GPC), a deacylatedphosphatidylcholine derivative, can influence the mitochondrial respiratory activity and in this way, may exert tissue protective effects. Methods Rat liver mitochondria were examined with high-resolution respirometry to analyze the effects of GPC on the electron transport chain in normoxic and anoxic conditions. Besides, Sprague-Dawley rats were subjected to sham operation or standardized liver ischemia-reperfusion (IR), with or without GPC administration. The reduced glutathione (GSH) and oxidized glutathione disulfide (GSSG), the tissue myeloperoxidase, xanthine oxidoreductase and NADPH oxidases activities were measured. Tissue malondialdehyde and nitrite/nitrate formation, together with blood superoxide and hydrogen-peroxide production were assessed. Results GPC increased the efficacy of complex I-linked mitochondrial oxygen consumption, with significantly lower in vitro leak respiration. Mechanistically, liver IR injury was accompanied by deteriorated mitochondrial respiration and enhanced ROS production and, as a consequence, by significantly increased inflammatory enzyme activities. GPC administration decreased the inflammatory activation in line with the reduced oxidative and nitrosative stress markers. Conclusion GPC, by preserving the mitochondrial complex I function respiration, reduced the biochemical signs of oxidative stress after an IR episode. This suggests that GPC is a mitochondria-targeted compound that indirectly suppresses the activity of major intracellular superoxide-generating enzymes.
Increased seizure duration and slowed potassium kinetics in mice lacking aquaporin‐4 water channels

The glial water channel aquaporin‐4 (AQP4) has been hypothesized to modulate water and potassium fluxes associated with neuronal activity. In this study, we examined the seizure phenotype of AQP4 −/− mice using in vivo electrical stimulation and electroencephalographic (EEG) recording. AQP4 −/− mice were found to have dramatically prolonged stimulation‐evoked seizures after hippocampal stimulation compared to wild‐type controls (33 ± 2 s vs. 13 ± 2 s). In addition, AQP4 −/− mice were found to have a higher seizure threshold (167 ± 17 μA vs. 114 ± 10 μA). To assess a potential effect of AQP4 on potassium kinetics, we used in vivo recording with potassium‐sensitive microelectrodes after direct cortical stimulation. Although there was no significant difference in baseline or peak [K+]o, the rise time to peak [K+]o (t1/2, 2.3 ± 0.5 s) as well as the recovery to baseline [K+]o (t1/2, 15.6 ± 1.5 s) were slowed in AQP4 −/− mice compared to WT mice (t1/2, 0.5 ± 0.1 and 6.6 ± 0.7 s, respectively). These results implicate AQP4 in the expression and termination of seizure activity and support the hypothesis that AQP4 is coupled to potassium homeostasis in vivo. © 2006 Wiley‐Liss, Inc.
Effect of Mother's Dominance Rank on Offspring Temperament in Infant Rhesus Monkeys (Macaca mulatta)

In humans, temperament plays an important role in socialization and personality. Some temperaments, such as behavioral inhibition are associated with an increased risk for psychopathology. Nonhuman primates can serve as a model for neurobiological and developmental contributions to emotional development and several recent studies have begun to investigate temperament in nonhuman primates. In rhesus monkeys, dominance rank is inherited from the mother and is associated with social and emotional tendencies that resemble differences in temperament. The current study assessed differences in temperament in infant rhesus monkeys as a function of maternal dominance rank. Temperament was assessed in 26 infants (13 males) from birth until 6 months of age with a battery that included Brazelton test, human intruder test, human intruder‐startle, cortisol stress reactivity, and home cage observations of interactions with peers and the mother. Throughout testing, infants lived with their mothers and a small group of other monkeys in indoor/outdoor runs. Dominance rank of the mothers within each run was rated as either low/middle (N = 18, 9 male) or high/alpha (N = 8, 4 female). Infants of high‐ranking mothers displayed more intruder‐directed aggression and reduced startle potentiation in the human intruder tests. Dominant offspring also had reduced levels cortisol and startle across development and spent more time away from mothers in the interaction tests. These results suggest that dominance of the mother may be reflected in behavioral reactivity of infants early in life. These findings set up future studies, which may focus on contributing factors to both dominance and temperament such as genetics, rearing, and socialization. Such factors are likely to interact across development in meaningful ways. These results also suggest future human‐based studies of a similar relationship may be warranted, although social dominance is clearly more complex in human than macaque societies. Am. J. Primatol. 75:65‐73, 2013. Published 2012 by Wiley Periodicals, Inc.†
Hypoxic Preconditioning with Cobalt of Bone Marrow Mesenchymal Stem Cells Improves Cell Migration and Enhances Therapy for Treatment of Ischemic Acute Kidney Injury

Mesenchymal stem cell (MSC) administration is known to enhance the recovery of the kidney following injury. Here we tested the potential of hypoxic-preconditioned-MSC transplantation to enhance the efficacy of cell therapy on acute kidney injury (AKI) by improving MSC migration to the injured kidney. Cobalt was used as hypoxia mimetic preconditioning (HMP). MSC were subjected to HMP through 24 h culture in 200 µmol/L cobalt. Compared to normoxia cultured MSC (NP-MSC), HMP significantly increased the expression of HIF-1α and CXCR4 in MSC and enhanced the migration of MSC in vitro. This effect was lost when MSC were treated with siRNA targeting HIF-1α or CXCR4 antagonist. SPIO labeled MSC were administered to rats with I/R injury followed immediately by magnetic resonance imaging. Imaging clearly showed that HMP-MSC exhibited greater migration and a longer retention time in the ischemic kidney than NP-MSC. Histological evaluation showed more HMP-MSC in the glomerular capillaries of ischemic kidneys than in the kidneys receiving NP-MSC. Occasional tubules showed iron labeling in the HMP group, while no tubules had iron labeling in NP group, indicating the possibility of tubular transdifferentiation after HMP. These results were also confirmed by fluorescence microscopy study using CM-DiI labeling. The increased recruitment of HMP-MSC was associated with reduced kidney injury and enhanced functional recovery. This effect was also related to the increased paracrine action by HMP-MSC. Thus we suggest that by enhancing MSC migration and prolonging kidney retention, hypoxic preconditioning of MSC may be a useful approach for developing AKI cell therapy.
Why are mediation effects so small?

ABSTRACT Identifying mediators in variable chains as part of a causal mediation analysis can shed light on issues of causation, assessment, and intervention. However, coefficients and effect sizes in a causal mediation analysis are nearly always small. This can lead those less familiar with the approach to reject the results of causal mediation analysis. The current paper highlights five factors that contribute to small path coefficients in mediation research: loss of information when measuring relationships across time, controlling for prior levels of a predicted variable, adding control variables to the analysis, ignoring measurement error in one’s variables, and using multiple mediators. It is argued that these issues are best handled by increasing the statistical power of the analysis, identifying the optimal temporal interval between variables, using bootstrapped confidence intervals to analyze the results, and finding alternate ways of assessing the meaningfulness of the indirect effect.
Molecular hydrogen emission in Cygnus A

We present J, H and K-band spectroscopy of Cygnus A, spanning 1.0–2.4 μm in the rest-frame and hence several rovibrational H2, H recombination and [Fe ii] emission lines. The lines are spatially extended by up to 6 kpc from the nucleus, but their distinct kinematics indicate that the three groups (H, H2 and [Fe ii]) are not wholly produced in the same gas. The broadest line, [Fe ii]λ1. 644, exhibits a non-Gaussian profile with a broad base (FWHM≃1040 km s−1), perhaps because of the interaction with the radio source. Extinctions to the line-emitting regions substantially exceed earlier measurements based on optical H recombination lines. Hard X-rays from the quasar nucleus are likely to dominate the excitation of the H2 emission. The results of Maloney, Hollenbach & Tielens are thus used to infer the total mass of gas in H2 v=1–0 S(1)-emitting clouds as a function of radius, for gas densities of 103 and 105 cm−3, and stopping column densities NH=1022–1024 cm−2. Assuming azimuthal symmetry, at least 2.3×108 M⊙ of such material is present within 5 kpc of the nucleus, if the line-emitting clouds see an unobscured quasar spectrum. Alternatively, if the bulk of the X-ray absorption to the nucleus inferred by Ueno et al. actually arises in a circumnuclear torus, the implied gas mass rises to ∼1010 M⊙. The latter plausibly accounts for 109 yr of mass deposition from the cluster cooling flow, for which within this radius.