Contact printed Co/insulator/Co molecular junctions

The authors report the contact printing of a Au/Co double layer (total thickness ∼20–40nm) onto a self-assembled monolayer surface to form molecular junctions under ambient conditions. The feature size ranges from 50×50μm2 to 2×2 mm2. Grazing incident x-ray diffraction of the multilayer junction shows all expected Au peaks, while elemental Co was confirmed by energy dispersive spectroscopy. Film thickness, roughness, and density were characterized by x-ray reflectivity. I-V measurements show a prominent hysteresis, likely associated with charge trapping at the metal-organic interface, not an intrinsic feature of alkanedithiol molecules

Why Iranian married women use withdrawal instead of oral contraceptives? A qualitative study from Iran

<p>Abstract</p> <p>Background</p> <p>Withdrawal as a method of birth control is still used in Iran. The aim of this study was to explore married women's perspectives and attitudes on withdrawal use instead of oral contraceptive (OC) in Tehran, Iran.</p> <p>Methods</p> <p>This was a qualitative study. Participants were 50 married women, not currently pregnant, not desiring pregnancy and who had been using withdrawal for contraception. Face-to face interviews were conducted to collect data. Content analysis was performed to analyze the data.</p> <p>Results</p> <p>Four major themes were extracted from the interviews: advantages, disadvantages, barriers for OC use, and husband-related factors. Advantages of withdrawal use were identified as: easy to use, convenient, ease of access, natural. Even those participants who had experienced unwanted pregnancy while using withdrawal, relied on withdrawal as their contraceptive method. Disadvantages of OC included concerns about side effects. Barriers related to use of OC included the need for medical advice, vaginal examination and daily use. Husband-related factors included: the husband wanted to be the primary decision maker on the number of children and that he preferred withdrawal.</p> <p>Conclusion</p> <p>Health providers should address misunderstandings that exist about OC and highlight the non-contraceptive health benefits of OC to balance the information provided for women. We suggest that not only women but also their spouses be advised in family planning programs.</p

Learning to Look: Cognitive Aspects of Visual Attention

Early visual orienting responses can be prevented in infants with central nervous system damage. Children who have extensive damage in the visual system may ignore whatever visual stimuli they receive. Other children who have a viable visual system may receive the stimuli, but have difficulty with perceiving, interpreting or acting on incoming stimuli. If experience is lacking, visual behavior may never develop. The development of visual pathways seems to depend on experience as well as physiological factors. Intervention must be planned to help multihandicapped children integrate what they see with what they know. Where there is a deficit in the sensory mechanism, repeated stimula­tion is necessary in order for the brain to receive and process visual stimuli. Visually impaired multihan­dicapped children do learn to visually attend and process visual information

An evaluation of the effects of a hospital unit on the development of multiply handicapped children

The evidence in this study appears to indicate that adopting a goal-planning approach can provide demonstrable and clear improvements in the developmental functioning of multiply handicapped blind children. However, while the improvements in functioning for self-help and sensorimotor abilities are quite significant, those for communication and language skills are much less so. Three possible hypotheses have been advanced as to why this should be so. The hypothesis that the setting might be an institutionalizing one was rejected on the grounds that some of the evidence did not fit with that from other populations. The second hypothesis referred to the lack of formal speech and communication training on the unit. The best possible test of this hypothesis would be to employ a speech therapist to work on the unit and support for such a scheme is being sought. Finally, it was hypothesized that the way in which the staff interacted with the children was not being sufficiently modified to take account of the children's handicaps