Improving the production of special-purpose wire

The drawing of 12X18H10T stainless-steel wire with a cupronickel coating and cadmium-plated carbon-steel wire is considered. The quality of zinc-plated carbon wire is shown to depend on the drawing temperature, which must be stable.     

Reliability and construct validity of the Paired-Associate Recognition Test: A test of declarative memory using Wisconsin Card Sorting stimuli.

The Paired-Associate Recognition Test (PART) was developed to test declarative memory using Wisconsin Card Sorting Test (WCST) stimuli, for use in physiologic neuroimaging studies of memory and executive function in schizophrenia. PART was administered to 55 healthy adults (30 male, 25 female) to establish reliability and construct validity. Reliability results indicate that PART performance was stable across trials and internally consistent. Convergent validity was confirmed by significant correlations between PART and standard measures of visual recall, and by PART loading on a memory factor. Divergent validity was established through low correlations between PART and WCST, and by a loading of WCST on a separate factor. Overall results indicate that PART can be administered reliably and that it requires declarative memory processes. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Influence of straightening conditions for a grinding wheel on the acoustic-signal intensity

Russian Engineering Research -     

Thermodynamics of Cr3+-Cr6+ equilibrium in borate melts

The Cr³⁺-Cr⁶⁺ equilibrium was studied in lithium and sodium aluminoborate melts in an air atmosphere at different temperatures. A mechanism of the Cr³⁺-Cr⁶⁺ redox reaction in glass melts has been suggested. Enthalpy and entropy of the reaction in molten borates were calculated and the results thus obtained have been discussed thermodynamically.     

On roundoff error problems in diffusion calculations

The problem of roundoff errors in diffusion calculations is illustrated by an extreme example. A two-group point core which is shown to have immediate absolute convergence using an infinite-length computer word, fails to converge to an acceptable level using a short-length computer word.     

Neuropsychological differences among empirically derived clinical subtypes of schizophrenia.

Neuropsychological profile differences between empirically derived clinical subtypes of schizophrenia were examined. Two hundred five patients and 209 demographically matched controls were administered a neuropsychological battery examining 8 domains. Subtypes included negative, disorganized, paranoid, Schneiderian, and mild. All subtypes displayed a neuropsychological profile of generalized impairment with greater deficits in learning, memory, and attention. Results were suggestive of diffuse cognitive dysfunction in schizophrenia with more severe deficits in learning and memory relative to executive skills. This pattern of greater learning and memory impairment was pronounced for disorganized patients. In contrast, paranoid patients outperformed disorganized and negative patients in several domains. These findings reflect bilateral frontal–temporal dysfunction, particularly in disorganized and negative patients. Subtype differences highlight the importance of conceptualizing schizophrenia as a multifocal disorder. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Formation and growth of Ni3Sn4 intermediate phase in the Ni - Sn system

Dipping experiments of Ni foils in molten tin were made in the temperature range, 280–310°C. In addition, experiments were conducted while passing a constant current through the system, the foils being used as electrodes. In SEM - EDS observations and analysis the Ni₃Sn₄ equilibrium intermediate phase was found to grow both as a layer at the solid/liquid interface and as platelets in the melt. Growth kinetics were found to be influenced by the dissolution of Ni in the melt. The voltage between the electrodes vs. time (V(t) curve), measured in-situ, was found to conform to SEM observations. The V(t) curves permit a qualitative evaluation of the layer growth process.     

Is unilateral breast enlargement always a sign of cancer?

Breast swelling is caused by many etiological factors, but should alert central vein occlusion in hemodialysis patients when the permanent vascular access is in the same arm. The swelling of the breast is caused by venous hypertension in the venous plexus draining the breast. Endovascular treatment relieves venous hypertension and related clinical signs. Additional diagnostic workup or invasive interventions such as a biopsy should be avoided in such patients, as diagnosis is straightforward with the presence of a functioning arteriovenous fistula in the same arm.