Wide-Field Lensing Mass Maps from Dark Energy Survey Science Verification Data

We present a mass map reconstructed from weak gravitational lensing shear measurements over 139  deg2 from the Dark Energy Survey science verification data. The mass map probes both luminous and dark matter, thus providing a tool for studying cosmology. We find good agreement between the mass map and the distribution of massive galaxy clusters identified using a red-sequence cluster finder. Potential candidates for superclusters and voids are identified using these maps. We measure the cross-correlation between the mass map and a magnitude-limited foreground galaxy sample and find a detection at the 6.8σ level with 20 arc min smoothing. These measurements are consistent with simulated galaxy catalogs based on N-body simulations from a cold dark matter model with a cosmological constant. This suggests low systematics uncertainties in the map. We summarize our key findings in this Letter; the detailed methodology and tests for systematics are presented in a companion paper.

Phase angle and n-3 polyunsaturated fatty acids in sickle cell disease

Phase angle, an impedance parameter used for nutritional assessment, is reflective of the capacitance properties of cell membranes. We have shown a significant correlation between the proportions of specific n-3 polyunsaturated fatty acids in the serum phospholipids of Nigerian children with sickle cell disease and their phase angles determined by bioelectrical impedance analysis.

Assessment of the bone status of Nigerian children and adolescents with sickle cell disease using calcaneal ultrasound and serum markers of bone metabolism

Growth and skeletal maturation are impaired in sickle cell disease (SCD). SCD is also associated with decreased bone mineral density (BMD) as determined by dual X-ray and photon absorptiometry. Quantitative ultrasound (US), which is as good a predictor of fracture as absorptiometry, provides additional information about bone architecture and elasticity. It is not known if the quantitative US parameters, broadband ultrasound attenuation (BUA) and speed of sound (SOS), are affected in children and adolescents with SCD. We therefore compared the bones of 80 children with SCD in Nigeria to those of age- and gender-matched controls using calcaneal ultrasound and the serum bone markers N-telopeptide of type1 collagen (NTx) and bone-specific alkaline phosphatase (BSAP), which are indicators of bone resorption and formation, respectively. BUA, which is reflective of BMD, was significantly lower for both the male and female SCD subjects compared with controls (86 vs 113 dB/MHz, P < 0.001 and 87 vs 100 dB/MHz, P < 0.001, respectively). However, SOS, which is more indicative of bone elasticity, was significantly different only for the male SCD subjects. Both NTx and BSAP were significantly reduced in the serum of the male and female SCD subjects. Correlations between BUA and serum NTx were found for both female controls and SCD subjects (r = 0.58, P < 0.001 and r = 0.32, P = 0.05, respectively), but not for the male subjects or controls. Significant correlations between BUA and BSAP were observed only for the female controls. In summary, we have shown that US analysis, in combination with serum markers of bone metabolism, can be used to distinguish bone development in children with SCD from that of nonaffected controls.

Adenophostin A can stimulate Ca2+ influx without depleting the inositol 1,4,5-trisphosphate-sensitive Ca2+ stores in the Xenopus oocyte

Adenophostin A possesses the highest known affinity for the inositol 1,4,5-trisphosphate (Ins(1,4,5)P3) receptor (InsP3R). The compound shares with Ins(1,4,5)P3 those structural elements essential for binding to the InsP3R. However, its adenosine 2'-phosphate moiety has no counterpart in the Ins(1,4,5)P3 molecule. To determine whether its unique structure conferred a distinctive biological activity, we characterized the adenophostin-induced Ca2+ signal in Xenopus oocytes using the Ca2+-gated Cl- current assay. In high concentrations, adenophostin A released Ca2+ from Ins(1,4, 5)P3-sensitive stores and stimulated a Cl- current that depended upon the presence of extracellular Ca2+. We used this Cl- current as a marker of Ca2+ influx. In low concentrations, however, adenophostin A stimulated Ca2+ influx exclusively. In contrast, Ins(1,4,5)P3 and (2-hydroxyethyl)-alpha-D-glucopyranoside 2',3, 4-trisphosphate, an adenophostin A mimic lacking most of the adenosine moiety, always released intracellular Ca2+ before causing Ca2+ influx. Ins(1,4,5)P3 could still release Ca2+ during adenophostin A-induced Ca2+ influx, confirming that the Ins(1,4, 5)P3-sensitive intracellular Ca2+ stores had not been emptied. Adenophostin- and Ins(1,4,5)P3-induced Ca2+ influx were not additive, suggesting that both agonists stimulated a common Ca2+ entry pathway. Heparin, which blocks binding to the InsP3R, prevented adenophostin-induced Ca2+ influx. These data indicate that adenophostin A can stimulate the influx of Ca2+ across the plasma membrane without inevitably emptying the Ins(1,4,5)P3-sensitive intracellular Ca2+ stores.

Speaking clearly for the hearing impaired: intelligibility differences between clear and less clear speakers

The clarity of the speech of 12 speakers was assessed by intelligibility tests with hearing impaired subjects and from self-ratings about the speaker's ability to communicate with such listeners. The results of these tests correlate positively. Self-ratings account for approximately 60% of the variance. Thus self-ratings can be used as a convenient practical way of establishing an individual speaker's clarity.

Early posterior ankle release in the treatment of congenital clubfoot

Eighty-one patients (116 clubfeet) underwent posterior ankle release before the age of two years, following unsatisfactory responses to serial corrective casts applied according to the technique of Kite. Seventy-three per cent of these feet showed no or only mild talar flattening at an average follow-up of 7.5 years. Four years, following posterior ankle release there was a none-mild talar flattening rate of 69 per cent in this group compared to a 40 per cent none-mild rate in ankle release reduces the incidence of recurrent equinus deformity and the necessity for subsequent surgery in comparison to the results obtained with serial plaster casts or with tendo Achillis lengthening alone. Recent trends in clubfoot management have favored increasingly early operative intervention. Denham stated that "In the infant hard tissues (bone and cartilage) should be regarded as soft, and the soft tissues (tendon and ligament) as hard." Our operative experience with posterior ankle release supports this philosophy and indicates that early aggressive surgical management is the treatment of choice for the resistant clubfoot.

Thoracolumbar scoliosis in cerebral palsy. Results of surgical treatment

Of 294 patients with cerebral palsy seen from 1960 to 1972, forty-two had clinically significant lumbar and thoracolumbar scoliosis (31 to 135 degrees) and thirty-three were treated by spine surgery: ten by Harrington instrumentation and posterior spine fusion, eighteen by the Dwyer procedure and anterior fusion, and five by a two-stage combined anterior and posterior fusion. Evaluation of the results after eighteen to sixty-eight months showed: relief of pain in seventeen cases, improved sitting tolerance in seventeen, less nursing care needed in three, less equipment required in six, ability to use equipment providing more function in three, placement in a facility where less care was required in two, and improved eating patterns in two. Only the combined procedure appeared to give adequate correction and a low incidence of pseudarthrosis.

Spinal cord injury in children

The spinal injured child has speical needs owing to the processes of physical, mental and social growth. Goals of physical treatment programs include prevention of: genitourinary complications; contractures; pressure sores; long bone fractures, hip subluxation and dislocation; spinal deformity. Nonoperative treatment of spinal deformity employing external support should be initiated when the potential for spinal deformity exists. External support delays the development of spinal deformity, improves sitting balance and allows free upper extremity use. The overall treatment programs must consider altered body proportions, immaturity of strength and coordination. Case examples of children with spinal injury are presented above to illustrate specific problems stemming from immaturity of physical, cognitive, and social development. Spinal surgery can be a conservative measure in the growing child when there is radiologic evidence of progressive spinal deformity. Posterior spinal fusion with Harrington instrumentation and external support permits immediate return to vertical activity.

Evolution of treatment of paralytic scoliosis at Rancho Los Amigos Hospital

Between 1954 and 1970, 351 patients with severe paralytic scoliosis were treated at Rancho Los Amigos Hospital. During this time the treatment evolved through five stages: body cast alone, halo cast, halo cast with buttons and traction wires, Harrington instrumentation, and finally preoperative halo-femoral traction and Harrington instrumentation. Coincident with this evolution, correction improved from 20 to 57 per cent, the incidence of curve progression dropped from 38 to 0 per cent, and curve extension decreased from 25 to 0 per cent, while postoperative recumbency was reduced from one year to about three weeks. In addition, complications changed, in general decreasing except for the rate of pseudarthrosis, which remained essentially the same. Clinically significant hyperlordosis involving the thoracic and lumbar spine was seen in sixteen patients who had long fusions from the fourth cervical vertebra and above to the fourth lumbar vertebra or the sacrum.