Empathy And Second Language Learning 1

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/98289/1/j.1467-1770.1972.tb00077.x.pd

Chemical Interactions and Their Role in the Microphase Separation of Block Copolymer Thin Films

The thermodynamics of self-assembling systems are discussed in terms of the chemical interactions and the intermolecular forces between species. It is clear that there are both theoretical and practical limitations on the dimensions and the structural regularity of these systems. These considerations are made with reference to the microphase separation that occurs in block copolymer (BCP) systems. BCP systems self-assemble via a thermodynamic driven process where chemical dis-affinity between the blocks driving them part is balanced by a restorative force deriving from the chemical bond between the blocks. These systems are attracting much interest because of their possible role in nanoelectronic fabrication. This form of self-assembly can obtain highly regular nanopatterns in certain circumstances where the orientation and alignment of chemically distinct blocks can be guided through molecular interactions between the polymer and the surrounding interfaces. However, for this to be possible, great care must be taken to properly engineer the interactions between the surfaces and the polymer blocks. The optimum methods of structure directing are chemical pre-patterning (defining regions on the substrate of different chemistry) and graphoepitaxy (topographical alignment) but both centre on generating alignment through favourable chemical interactions. As in all self-assembling systems, the problems of defect formation must be considered and the origin of defects in these systems is explored. It is argued that in these nanostructures equilibrium defects are relatively few and largely originate from kinetic effects arising during film growth. Many defects also arise from the confinement of the systems when they are ‘directed’ by topography. The potential applications of these materials in electronics are discussed

Ocean Acidification Risk Assessment for Alaska's Fishery Sector

The highly productive fisheries of Alaska are located in seas projected to experience strong global change, including rapid transitions in temperature and ocean acidification-driven changes in pH and other chemical parameters. Many of the marine organisms that are most intensely affected by ocean acidification(OA) contribute substantially to the state’s commercial fisheries and traditional subsistence way of life. Prior studies of OA’s potential impacts on human communities have focused only on possible direct economic losses from specific scenarios of human dependence on commercial harvests and damages to marine species. However, other economic and social impacts, such as changes in food security or livelihoods, are also likely to result from climate change. This study evaluates patterns of dependence on marine resources within Alaska that could be negatively impacted by OA and current community characteristics to assess the potential risk to the fishery sector from OA. Here, we used a risk assessment framework based on one developed by the Intergovernmental Panel on Climate Change to analyze earth-system global ocean model hindcasts and projections of ocean chemistry, fisheries harvest data, and demographic information. The fisheries examined were: shellfish, salmon and other fin fish. The final index incorporates all of these data to compare overall risk among Alaska’s federally designated census areas. The analysis showed that regions in southeast and southwest Alaska that are highly reliant on fishery harvests and have relatively lower incomes and employment alternatives likely face the highest risk from OA.Although this study is an intermediate step toward our full understanding, the results presented here show that OA merits consideration in policy planning, as it may represent another challenge to Alaskan communities, some of which are already under acute socio-economic strains.This study is part of the Synthesis of Arctic Research (SOAR) and was funded in part by the U.S. Department of the Interior, Bureau of Ocean Energy Management, Environmental Studies Program through Interagency Agreement No. M11PG00034 with the U.S. Department of Commerce, National Oceanic and Atmospheric Administration (NOAA), Office of Oceanic and Atmospheric Research (OAR), Pacific Marine Environmental Laboratory (PMEL).Ye

Changing Outdated Methadone Regulations That Harm Pregnant Patients

: Methadone regulations have changed minimally since 1974, despite advances in the understanding of the nature of opioid use disorder (OUD) and the role of medications in its treatment. At that time, most patients with OUD were considered to have anti-social personality disorders and the regulations aimed to exert maximal control over medication access. Six- or seven-day clinic attendance is required for months, regardless of distance, or childcare and other social responsibilities. Take home medications are not allowed unless rigid and formulaic conditions are met. Although addiction medicine has rejected the criminal paradigm in favor of OUD as a treatable medical disorder, methadone regulations have not kept pace with the science.Pregnancy is characterized by an ultra-rapid metabolic state, but regulations prevent the use of daily divided doses of methadone to maintain stability. This results in repeated episodes of maternal/fetal opioid withdrawal, as well as other fetal physiologic abnormalities. Interference with dose regimen adjustments prevents optimal outcomes.Further, methadone clinics are mostly urban, leaving patients in rural areas without access. This led to excessive morbidity and mortality when the opioid crisis hit. The response of merely expanding capacity in overcrowded urban clinics created a contagion menace when Covid-19 arrived. Pregnant women (and parents with children) were forced to negotiate dosing in dangerous conditions.A revised methadone system must provide treatment that is local, flexible, and limited in size to manage viral contagion risks. This regulatory change can most easily be started by changing regulations that adversely affect pregnant women