Boys and girls together—and alienated: On enacting stereotyped sex roles in mixed-sex dyads.

Determined how individual differences in sex role orientation (assessed by the Bem Sex Role Inventory) were related to behavior of 43 male and 43 female undergraduates during an initial, unstructured interaction in mixed-sex dyads. The design contrasted 4 different dyad types: (a) the male and female were stereotypically sex typed correspondent to their gender (male ST–female ST). (b) The male was stereotypically sex typed as masculine and the female as androgynous (male ST–female A). (c) The male was androgynous and the female was sex typed as feminine (male A–female ST). (d) Both were androgynous (male A–female A). Analyses of the Ss' behavior during the 5-min interaction period and self-report data collected afterward revealed significantly less interaction and interpersonal attraction in the male ST–female ST dyads than in the other dyad types. Data are discussed in terms of S. L. Bem's (1974) conception of sex role identification and M. Snyder's (1974) conception of self-monitoring. (53 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Support provision in marriage: The role of emotional similarity and empathic accuracy.

The goal of this investigation was to identify microlevel processes in the support provider that may foster or inhibit the provision of spousal support. Specifically, the authors focused on (a) how emotional similarity between the support provider and support seeker and (b) how empathic accuracy of the support provider relate to support provision in marriage. In a laboratory experiment, 30 couples were randomly assigned to 1 of 2 conditions (support provider: man vs. woman) of a factorial design. The couples provided questionnaire data and participated in a social support interaction designed to assess behaviors when offering and soliciting social support. A video-review task was used to assess emotional similarity and empathic accuracy during the support interaction. As expected, greater similarity between the support provider's and support seeker's emotional responses, as well as more accurate insights into the support-seeking spouse's thoughts and feelings were found to be predictive of more skilful support (i.e., higher levels of emotional and instrumental support and lower levels of negative types of support). (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

PVD solutions for automotive thin film applications

As automotive lighting is in the transition from a simple combination of an incandescent light bulb with beam shaping reflective surfaces towards quite complex headlamps equipped white matrix LED in combination with transmission optics, the requirements to achieve a high efficiency also changed. While the former headlamps require a high reflectance, the latter design gains a high efficiency via a maximized transmittance. In addition, new challenges arise due to an increasing amount of cameras, new components like Lidar and sensors for driving safety in modern as well as future autonomous driving cars. Physical vapour deposition (PVD) thin film technologies are able to produce coatings for the previously mentioned applications but also offer extraordinary upside potential for future sensor technologies.     

The development of meaning contexts for empathic accuracy: Channel and sequence effects.

This study examined the effects of both immediate and cumulative contextual knowledge on empathic accuracy. Participants viewed excerpts from videotapes of 3 simulated psychotherapy sessions and attempted to infer each client's actual thoughts and feelings. Immediate contextual knowledge was varied by controlling the informational channels available. Cumulative contextual knowledge was varied by presenting the excerpts from each tape in either their original order or in a random order. The results revealed that empathic accuracy in this clinically relevant context was primarily dependent upon verbal, rather than nonverbal, cues. Knowledge of the cumulative meaning context was also important, however, in that it led perceivers to respond in a schema-driven fashion that sometimes facilitated, but at other times impaired, their empathic accuracy. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Empathic accuracy in the interactions of male friends versus male strangers.

In unstructured interactions, male friends were found to be more accurate than male strangers in inferring each other's thoughts and feelings. Plausible reasons for this difference were that friends (1) interacted more and exchanged more information, (2) had more similar personalities and therefore more rapport with each other, and (3) had more detailed knowledge of each other's lives. Data confirmed that the friends did indeed interact more and were more similar in their sociability than the strangers; however, these differences did not account for the friends' greater empathic accuracy. Instead, this was primarily attributable to a difference in knowledge structures, namely, the friends' ability to accurately read their partners' thoughts and feelings about imagined events in another place or time. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Long-term recovery of PCB-contaminated surface sediments at the Sangamo-westonl Twelvemile Creek/lake Hartwell Superfund Site

Natural recovery of contaminated sediments relies on burial of contaminated sediments with increasingly clean sediments over time (i.e., natural capping). Natural capping reduces the risk of resuspension of contaminated surface sediments, and it reduces the potential for contaminant transport into the food chain by limiting bioturbation of contaminated surface or near-surface sediments. This study evaluated the natural recovery of surface sediments contaminated with polychlorinated biphenyls (PCBs) at the Sangamo-Weston/Twelvemile Creek/Lake Hartwell Superfund Site (Lake Hartwell), Pickens County, SC. The primary focus was on sediment recovery resulting from natural capping processes. Total PCB (t-PCB), lead-210 (210Pb), and cesium-137 (137Cs) sediment core profiles were used to establish vertical t-PCB concentration profiles, age date sediments, and determine surface sedimentation and surface sediment recovery rates in 18 cores collected along 10 transects. Four upgradient transects in the headwaters of Lake Hartwell were impacted by historical sediment releases from three upgradient sediment impoundments. These transects were characterized by silt/ clay and sand layering. The highest PCB concentrations were associated with silt/clay layers (1.8-3.5% total organic carbon (TOC)), while sand layers (0.05-0.32% TOC) contained much lower PCB concentrations. The historical sediment releases resulted in substantial burial of PCB-contaminated sediment in the vicinity of these four cores; each core contained less than 1 mg/kg t-PCBs in the surface sand layers. Cores collected from six downgradient Lake Hartwell transects consisted primarily of silt and clay (0.91-5.1% TOC) and were less noticeably impacted by the release of sand from the impoundments. Vertical t-PCB concentration profiles in these cores began with relatively low PCB concentrations at the sediment-water interface and increased in concentration with depth until maximum PCB concentrations were measured at approximately 30-60 cm below the sediment-water interface, ca. 1960-1980. Maximum t-PCB concentrations were followed by progressively decreasing concentrations with depth until the t-PCB concentrations approached the detection limit, where sediments were likely deposited before the onset of PCB use at the Sangamo-Weston plant. The sediments containing the maximum PCB concentrations are associated with the period of maximum PCB release into the watershed. Sedimentation rates averaged 2.1 +/- 1.5 g/(cm2 yr) for 12 of 18 cores collected. The 1994 Record of Decision cleanup requirement is 1.0 mg/kg; two more goals (0.4 and 0.05 mg/kg t-PCBs) also were identified. Average surface sedimentation requirements to meet the three goals were 1.4 +/- 3.7, 11 +/- 4.2, and 33 +/- 11 cm, respectively. Using the age dating results, the average recovery dates to meet these goals were 2000.6 +/- 2.7, 2007.4 +/- 3.5, and 2022.7 +/- 11 yr, respectively. (The 95% prediction limits for these values also are provided.) Despite the reduction in surface sediment PCB concentrations, PCB concentrations measured in largemouth bass and hybrid bass filets continue to exceed the 2.0 mg/kg FDA fish tolerance level.     

Characterization and FATE of PAH-contaminated sediments at the Wyckoff/Eagle Harbor Superfund Site

Eagle Harbor, a shallow marine embayment of Bainbridge Island, WA approximately 10 miles west of Seattle, WA), was formerly the site of the Wyckoff wood-treatment facility. The facility used large quantities of creosote in its wood-treating processes from the early 1900s to 1988. Historical creosote seepage into the harbor resulted in substantial accumulation of polycyclic aromatic hydrocarbon (PAH) contamination in the harbor sediments over time. This investigation focused on the distribution and fate of the PAH-contaminated harbor sediments. Analyses of 10 sediment cores using total petroleum hydrocarbon (TPH) fingerprinting, the distribution of 50 PAH analytes, and sediment age dating revealed the contributions of three distinct sources of PAHs to sediment contamination in the harbor during various periods over the past 100 years; namely, creosote, urban runoff, and natural background. Surface sediments (upper 20-30 cm) in the cores closestto the Wyckoff wood-treatment facility and southeast of an existing cap were dominated by urban runoff and weathered creosote; the deeper sediments (> 30 cm) were heavily contaminated with relatively unweathered creosote and some pure-phase creosote. Cores located the furthest from the area of contamination, in the center of the harbor, were dominated by urban runoff, showed no signs of creosote contamination, and had much lower PAH and TPH concentrations than those adjacent to the facility. In the four cores in the center of the Harbor, farthest from the former Wyckoff facility, PAH concentrations increased significantly (p < 0.01) with proximity to the northern shore of the harbor, which is more heavily developed than the southern shore and is where all automobile traffic enters and exits the island through the Bainbridge Island ferry terminal. Deeper portions of these cores were contaminated primarily with natural background PAHs, likely representing preurbanization sediments. Sedimentation rates ranged from 0.54 to 1.10 gm/ cm2 in the four cores located in the middle of the harbor, and for the single nearshore core that could be used to calculate sedimentation rates. Recognition that urban runoff has been a fairly consistent and ongoing source of PAHs to the harbor's sediments for the past 50-70 years may influence future sediment management decisions for this site with respect to long-term monitoring of surface sediments to assess cap performance. The results provided information on the ability of Eagle Harbor sediments to recover under natural conditions, identified the occurrence of creosote-derived PAH weathering in off-cap surface sediments, and distinguished between these distinct PAH sources in the harbor (creosote, urban runoff, and natural background).