Impurity diffusion process for silicon semiconductors is fast and precise

Impurity diffusion process produces precision silicon semiconductor junctions economically and fast. Oxide is deposited on a silicon wafer and a controlled concentration of impurity atoms in gaseous form is simultaneously introduced into the reaction

Symbol table algorithms - Computer evolution project, volume 2, no. 1

Algorithms for accessing symbol tables in compile

Evaluation of ignition mechanisms in selected nonmetallic materials

Test program evaluates thermal and electric ignition mechanisms in selected nonmetallic materials found in spacecraft with concentrated oxygen atmospheres. The phenomena evaluated were spontaneous ignition, ignition of flammable vapor by a spark, and ignition by an arc where the arc produces the combustible vapor and the ignition source

The measurement of enhancement in mathematical abilities as a result of joint cognitive trainings in numerical and visual-spatial skills: A preliminary study

A body of literature shows the significant role of visual-spatial skills played in the improvement of mathematical skills in the primary school. The main goal of the current study was to investigate the impact of a combined visuo-spatial and mathematical training on the improvement of mathematical skills in 146 second graders of several schools located in Italy. Participants were presented single pencil-and-paper visuo-spatial or mathematical trainings, computerised version of the above mentioned treatments, as well as a combined version of computer-assisted and pencil-and-paper visuo-spatial and mathematical trainings, respectively. Experimental groups were presented with training for 3 months, once a week. All children were treated collectively both in computer-assisted or pencil-and-paper modalities. At pre and post-test all our participants were presented with a battery of objective tests assessing numerical and visuo-spatial abilities. Our results suggest the positive effect of different types of training for the empowerment of visuo-spatial and numerical abilities. Specifically, the combination of computerised and pencil-and-paper versions of visuo-spatial and mathematical trainings are more effective than the single execution of the software or of the pencil-and-paper treatment

Diffusion of impurities into silicon from gaseous sources

Diffusion of impurities into silicon from gaseous source

System maintains constant penetration during fusion welding

Servo system senses variations in fusion welding process, and adjusts the control parameters to compensate for them. The system assumes a correlation between uniform weld penetration and temperature gradients near the molten puddle. It senses weld properties and makes adjustments to travel speed and weld current

The Impact of Cognitive Functioning on Daily Occupations for People with Multiple Sclerosis: A Qualitative Study

Background: Cognitive rehabilitation research in multiple sclerosis is ever-developing, but the impact of cognitive difficulties, seen in 40% to 80% of people, on daily occupations is not well known. The aim of this study is to explore the needs of people with MS who have self-reported cognitive deficits. Methods: An exploratory qualitative descriptive research design was used. Data was collected through semi-structured telephone interviews with the participants. Recordings were transcribed and analyzed thematically. Results: Seven participants were recruited (mean age 47). Three themes were developed through associations found in the data. “Neglected symptom” reported the participants’ frustrations around the importance afforded to cognition by health care providers. “Impact on participation in daily occupations” described the everyday impacts of cognitive difficulties. “Adaptations and adjustments to continued participation” reported how the participants manage, despite their difficulties. Conclusion: The findings describe how cognitive difficulties affect individuals with multiple sclerosis and their occupations, as well as the dissatisfaction felt with the progress in and access to cognitive treatment and research. The results indicate the need for occupation-focused interventions in cognition for people with multiple sclerosis that address daily challenges

On using paging - Computer evolution project, volume 2, no. 5

Improved technique for paging computer memor