Behavioral and characterological attributional styles as predictors of depression and loneliness: Review, refinement, and test.

The literature on self-blame and depression reveals 2 interrelated problems. First, although R. Janoff-Bulman's (see record 1981-01320-001) conceptualizations of self-blame are clear, empirical operationalization is difficult and has resulted in approaches that do not capture the richness of the constructs. Second, past research has produced inconsistent findings. A comprehensive literature review revealed that the inconsistencies are related to the method of assessing attributions. A correlational study, with 2 samples of 680 and 321 undergraduates, designed to more accurately represent the self-blame conceptualization revealed that both behavioral and characterological self-blame contribute uniquely to depression and loneliness. Supplementary results regarding circumstantial attributions and regarding attributional styles for success were presented. Empirical issues regarding possible methodological refinements and effect size, as well as the value of categorical approaches to the study of attributional style were discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Trends in elastomeric impression materials

In the past three years more addition silicones have been supplied as hydrophilic materials and heavier viscosities have been provided in automatic mixing cartridges. Also, a polyether is now supplied in an automatic mixing system. There has been an increase in the number of products available as monophase or single viscosity systems. Both addition silicones and polyethers are available as bite registration materials.     

Evidence for glutamate as a neurotransmitter in spinothalamic tract terminals in the posterior region of owl monkeys

Small aquarium fish, like the medaka and zebrafish, offer an excellent opportunity to combine embryological, genetic and molecular analyses of vertebrate development. Pluripotent embryonic stem (ES) cells have enormous potential to study the totipotency and differentiation of cells and provide s bridge linking in vitro manipulations of the genome. In this report we describe the establishment, pluripotency and differentiation of medaka ES-like cell lines (MES). The MES cells exhibit stable growth over 18 months of culture with 100 passages using defined culture conditions in the absence of feeder layer cells. They have a normal karyotype and form colonies of densely packed, alkaline phosphatase-positive cells resembling undifferentiated mouse ES cells. In suspension culture they form embryoid bodies, and under appropriate conditions, differentiate into a variety of cell types.     

Energy control of the IMPELA series of industrial accelerators

Electron accelerator sources of radiation for industrial processes must maintain constant and reproducible irradiation parameters in order to provide satisfactory dose quality assurance. The advanced control system used in AECL's IMPELA^TM series of accelerators ensures this by making it possible to decouple the primary accelerator variables, beam energy and beam current. Beam energy is made independent of current by controlling the field amplitude in the standing-wave structure during a relatively long pulse (50–500 μs) and an energy stability similar to that of dc machines is achieved. Experiments with the calibration linac facility at Chalk River show that the beam energy can be held constant to within ± 2% on an absolute basis. This eliminates the requirement for the complex beam analysis after acceleration used on short-pulse linacs. Methods for the measurement of energy at the users site and at the calibration facility are described.     

Porous organosilicates low-dielectric films for high-frequency devices

The dielectric properties are reported for nanoporous thin films of poly(methyl silsesquioxane) (MSSQ) for use as an ultralow, dielectric intermetal insulator. Direct experimental conformation is provided that the films have low dielectric constants with low loss up to 10 GHz. Low-frequency measurements are also reported.     

Development of substrate-pumped nMOS protection for a 0.13 μm technology

A methodology is presented for improved process and circuit development of substrate-pumped nMOS protection. ESD process development is accelerated by applying factor analysis to completed non-ESD experiments. Factor analysis is complemented by a straightforward diagnosis of nMOS snapback. This approach enabled verification of two process solutions, including a novel method, in one fab cycle-time. HBM data that shows the substrate-pumped nMOS can provide dramatically higher protection than estimated from conventional I_t2 measurements. This motivates improved ESD circuit development. The nMOS clamp transistor is characterized as an actively biased LNPN, which is how it is used in a substrate-pumped protection circuit. A systematic approach to circuit development is described that is based upon empirical characterization of well-defined circuit components under conditions approximating ESD.     

CAT4 (Cable Actuated Truss—4 Degrees of Freedom): A Novel 4 DOF Cable Actuated Parallel Manipulator

The CAT4 (Cable Actuated Truss—4 degrees of freedom) robot is a novel, passively jointed, parallel robot utilizing six control cables for actuation. The architecture has been under development at the Queen's University Robotics Laboratory. The robot utilizes a passive jointed linkage with 18 revolute joints to constrain the end effector motion and provide the desired structural stability, restricting the end effector to 3 translational degrees of freedom (DOF) and 1 DOF for end effector pitch. This central mechanism together with winched cable actuation gives a number of important benefits for applications where the advantages of a parallel robot are required in conjunction with light weight. Six electric motor driven winches control the length of the cable actuators that extend from the top frame to points on the end effector raft and jointed linkage to create a stiff, but lightweight, actuated robot. Simulation work on the robot is presented giving the kinematics, including a computational estimate of the workspace for a specific configuration. Results of computational simulation of the motion of the manipulator and a discussion of the advantages and potential difficulties are also presented. © 2002 Wiley Periodicals, Inc.