832 resultados para Psychosocial Patern (PPS)
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[EN]Bresnan and Nikitina (2009) and Rappaport Hovav and Levin (2008) show that, contrary to standard assumptions, fixed-theme idioms may appear in to-constructions under certain pragmatic circumstances. Bruening (2010a) contends that the cases they present are in fact R(ightward)-dative shifts, double object constructions with the object projected to the right. In this article, we argue that Bruening’s proposed theoretical apparatus is unnecessarily complex and ad hoc and falls short of explaining the main facts it is supposed to deal with, massively overgenerating. A regular PP structure is argued to be empirically more adequate and conceptually simpler, avoiding the main problems of the R-dative shift analysis. New empirical evidence concerning pairlist readings and scope freezing also suggests that the empirical facts about idioms should be reconsidered in completely different terms.
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本工作旨在通过共聚、共混技术制备酚酞型聚芳醚砜共聚物(PP/BiS-T) PES和共混物(PPS/PES-C)、PPO/PES-C,以便改善酚酞型聚芳醚砜(PES-C)的加工性能(特别是注射加工性能)和耐溶剂性能。通过研究共聚物和共混物的微观结构,聚集态结构与性能的关系,探索改善酚酞型聚芳醚硕性能的有效途径第一部分:(PP/BiS-T) PES共聚物的合成、结构与性能(PP/BiS-T) PES共聚物是以4,4'二氯二苯砜(DCDPS)、酚酞(PP)和4,4'-二羟基二苯硫醚(BiS-T)为单体,采用固体无水K_2CO_3/NMP/TMSO_2 混合溶剂反应体系合成的。共聚反应规律研究表明:在NMP/TMSO_2混合溶剂中,共聚反应可以顺利进行,避免了交联反应的发生,并成功地合成了高分子量的(PP/BiS-T) PES共聚物。DSC分析结果表明(PP/BiS-T) PES系列属于无定形的均相共聚物体系,每一组成比例对应的共聚物只具有一个玻璃化转变温度。且随组成比例的改变呈线性变化,TBA分析结果与DSC基本一致,并证实了(PP/BiS-T) PES属于均相共聚物体系,而不是均聚物的共混物。TG分析表明:共聚物具有良好的耐热氧化稳定性BiS-T链节在分子链中起到了提高自身抗氧性的作用。1R光谱对共聚物的结构进行表征。~(13)C-NMR分析确认共聚物多属于无规共聚物。动态力学试验表明共聚物(PP/BiS-T) PES以及PES-C,在-100 ℃附近和0-100 ℃,存在着次级松驰与转变,并发现水分子的存在对这种转变(次级松驰)有一定的影响。共聚物的熔融流动性试验和溶解性试验表明共聚物(PP/BiS-T) PES具有稍好于PES-C的熔融流动性;溶解性与PES-C类似。力学试验说明共聚物属于强而硬类型的聚合物。第二部分:PPS/PES-C共混物的制备、聚集态结构与性能PPS/PES-C共混物是以联苯/二苯硕混合物为溶剂,采用溶液沉析方法制备的,DSC、WAXD,SEM和1R分析手段对共混物的聚集态结构和微观结构进行了表征。DSC分析认为共混物属于多相体系,PPS的结晶性随着PES-C含量增加而降低。DSC和SEM观察结果表明:相转变发生在PPS占40%左右。PPS占25%时,DSC曲线呈现出界面相玻璃化转变温度。共混物具有良好的耐热氧化稳定性和耐热分解稳定性。微晶大小计算结果:PES-C存在导致了PPS微晶大小降低。WAXD曲线表明PPS占50%,共混物中的PPS具有较好的结晶性。SEM观察发现:随着PES-C含量增加,PES-C由分散相(PES-C50%)变为连续相(PES-C70%)。PPS占50%或低于50%时,共混物体系不仅发生了微观相分离,而且发生了宏观相分离。M.I.指数表明共混物中PPS为连续相时,共混物具有良好的熔融流动性。溶解性试验结果:共混物具有较好的耐溶剂性。第三部分:PPO/PES-C共混物的合成、结构与性能 PPO/PES-C共混物系用溶液-涂膜法,以氯彷为溶剂制备的。讨论了由同一共混物溶液浓度下制备的共混物的互溶性随组成的改变而变化。DSC分析结果:PPO/PES-C属于部分相溶性体系。利用Fox方程推导式计算结果表明PPO在富PES-C相中具有良好的分散性;而PES-C在富PPO相中的分散性较差。共混物(PPO/PES-C)试样经丙酮浸泡后,PPO(>50%)发生了溶剂诱导结晶现象,同时丙酮促使共混物发生完全相分离。结晶溶化热显示共混物中少量的PES-C存在有利于PPO的溶剂诱导结晶。TG分析表明共混物具有良好的耐热分解稳定性和耐热氧化分解稳定性。偏光显微镜下观察到PPO球晶的存在。SEM和FT-1R分别对共混物的形态结构和微观结构进行了表征。WAXD试验证实了丙酮处理的(PPO/PES-C)(70/30),(90/10)共混物中PPO的结晶性。溶解性试验表明:PPO掺入有助于 PES-C的耐溶剂性提高。
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聚苯硫醚(PPS)是特种工程塑料中应用最广、价格最低的品种。但由于其耐冲击性差,限制了其做为结构材料的应用。本论文通过多种研究方法,研究了PPS抗冲击性差的根本原因和改善途径,从改变其聚集态结构入手,使韧性得到了很大改善,为高抗冲PPS的研制提供和积累了丰富了可靠的数据,其创新性成果体现在:提出了含刚性非晶相、可动(类液)非晶相和晶相的PPS三相模型并计算了各相的相对含量、测定了各相的密度;发现了PPS的冲击强度与其结晶度呈近似线性的关系。是十分有意义的基础性工作。用核壳乳液聚合物做为PC的增韧剂,有效地控制了共混物的形态结构、计算出了界面层厚度与界面张力,为制备具有综合性能的改性PC材料奠定了理论和实践基础。
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Blends of poly(ether-sulfone) (PES) and poly(phenylene sulfide) (PPS) with various compositions were prepared using an internal mixer at 290degreesC and 50 rpm for 10 min. The thermal and dynamic mechanical properties of PES/PPS blends have been investigated by means of DSC and DMA. The blends showed two glass transition temperatures corresponding to PPS-rich and PES-rich phases. Both of them decreased obviously for the blends with PES matrix. On the other hand, T-g of PPS and PES phase decreased a little when PPS is the continuous phase. In the blends quenched from molten state the cold crystallization temperature of PPS was detected in the blends of PES/PPS with mass ratio 50/50 and 60/40. The melting point, crystallization temperature and the crystallinity of blended PPS were nearly unaffected when the mass ratio of PES was less than 60%, however, when the amount of PES is over 60% in the blends, the crystallization of PPS chains was hindered. The thermal and the dynamic mechanical properties of the PPS/PES blends were mainly controlled by the continued phase.
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结晶-非晶高聚物共混体系的相容性和结晶行为的研究已有许多报道。本工作研究了含酞侧基聚芳醚酮(PEK-C)与聚苯硫醚(PPS)共混物的相容性和结晶行为。 PEK-C为徐州工程塑料厂产品,未作封端处理,η?p/c=0.70;PPS为日本东丽产品。两者用双螺杆挤出机在320~350℃制成共混物。仪器为Perkin-Elmer DSC-7型差示扫描量热仪,升温速率10℃/min;DDV-Ⅱ-EA型全自动动态粘弹谱仪和理学D/max-ⅡBX-射线衍射仪。
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研究了聚芳醚砜(PES-C)/聚苯硫醚(PPS)共混物的聚集态结构与熔融流动性以及两者之间的内在关系。结果表明,PES-C/PPS共混体系属于多相体系,PES-C占50%时,PPS成为连续相,共混物在该组成比例下具有良好的熔融流动性。
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Introduction: Worldwide, governments are striving to keep people in work to an older age. However, little is known about the effects of work on an older workforce. This thesis aims to investigate the importance of job characteristics to the antecedents and evolution of cardiovascular disease and functional limitations for the older worker (50+ years). Methods: Three studies were used in this thesis. The 5C (Cork Coronary Care Case- Control) Study investigated the association between job strain and a coronary event in males (n=208) 35-74 years old. The Mitchelstown Study examined the association between job characteristics and positive lifestyle behaviours and further, job characteristics and blood pressure for males and females 50-69 years (n=2,047). Finally, the Cork & Kerry Study investigated the physical effects of manual work and reported functional limitations/disabilities in a sample of 60-80 year olds (n=362). Results: Results from the 5C Study show a clear difference between younger (<50 years) and older (≥50 years) workers, with older workers who had a coronary event more likely to have high job strain and low job control. Data from the Mitchelstown Study showed workers with intermediate possibility for development or high quantitative demands (versus low) at work significantly more likely to have co-occurrence of positive lifestyle behaviours. Further, those who had high possibility for development were more likely to have high systolic blood pressure with no indication of recovery from this activation at night. Physically demanding work as reported by the participants of the Cork & Kerry Study was associated with functional limitations and activities of daily living disability for both the paid and unpaid worker. Discussion: The findings from this piece of work highlight the necessity to examine job characteristics and health outcomes in isolation for the over fifties. The challenge is to get this information into the workplace.
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This thesis explores the psychosocial wellbeing of sub-Saharan African migrant children in Ireland. A sociocultural ecological (Psychosocial Working Group, 2003) and resilience lens (Masten & Obradovic, 2008; Ungar, 2011) is used to analyse the experiences of African migrant children in Ireland. The research strategy employs a mixed-methods design, combining both an etic and emic perspective. Grounded theory inquiry (Strauss and Corbin, 1994) explores the experiences of African migrant children in Ireland by drawing on multi-sited observations over a period of six months in 2009, and on interviews and focus group discussions conducted with African children (aged 13-18), mothers and fathers. An emically derived ‘African Migrant Child Psychosocial Well-being’ scale was developed by drawing on data gathered through rapid ethnographic (RAE) free listing exercises carried out in Cork, Dublin and Dundalk with sixty-one participants (N=21 adults, N=28 15-18-year-olds, N=12 12-14-year-olds) and three African community key informants to elicit local understandings of psychosocial well-being. This newly developed scale was used alongside standardised measures of well-being to quantitatively measure the psychosocial adjustment of 233 African migrant children in Cork, Dublin and Dundalk aged 11-18. Findings indicate that the psychosocial wellbeing of the study population is satisfactory when benchmarked against the psychosocial health profile of Irish youth (Dooley & Fitzgerald, 2012). These findings are similar to trends reported in international literature in this field (Georgiades et al., 2006; Gonneke, Stevens, Vollebergh, 2008; Sampson et al., 2005). Study findings have implications for advancing psychosocial research methods with non-Western populations and on informing the practice of Irish professionals, mainly in the areas of teaching, psychology and community work.
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Introduction: Stroke is a chronic condition that significantly impacts on morbidity and mortality (Balanda et al. 2010). Globally, the complexity of stroke is well documented and more recently, in Ireland, as part of the National Survey of Stroke Survivors (Horgan et al. 2014). There are a number of factors that are known to influence adaptation post stroke. However, there is a lack of research to explain the variability in how survivors adapt post stroke. Hardiness is a broad personality trait that leads to better outcome. This study investigated the influence of hardiness and physical function on psychosocial adaptation post stroke. Methods: A quantitative cross-sectional, correlational, exploratory study was conducted between April and November 2013. The sample consisted of stroke survivors (n=100) who were recruited from three hospital outpatient departments and completed a questionnaire package. Results: The mean age of participants was 76 years (range 70-80), over half (56%) of the participants achieved the maximum score of 20 on the Barthel Index indicating independence in activities of daily living. The median number of days since stroke onset was 91 days (range 74-128). The total mean score and standard deviation for hardiness was 1.89 (0.4) as measured by the Dispositional Resilience Scale, indicating medium hardiness (possible range 0-3). Psychosocial adaptation was measured using the Psychosocial Adjustment to Illness Scale, the total weighted mean and standard deviation was 0.54 (0.3) indicating a satisfactory level of psychosocial adaptation (possible range 0-3). A hierarchical multiple linear regression was performed which contained 6 independent variables (hardiness, living arrangement, and length of hospital stay, number of days since stroke onset, physical function and self-rated recovery). Findings demonstrated that physical function (p<0.001) and hardiness (p=0.008) were significantly related to psychosocial adaptation. Altogether, 65% of the variation in psychosocial adaptation can be explained by the combined effect of the independent variables. Physical functioning had the highest unique contribution (11%) to explain the variance in psychosocial adaptation while self-rated recovery, hardiness, and living arrangements contributed 3% each. Conclusion: This research provides important information regarding factors that influence psychosocial adaptation post stroke at 3 months. Physical function significantly contributed to psychosocial adaptation post stroke. The personality trait of hardiness provides insight into how behaviour influenced adaptation post stroke. While hardiness also had a strong relationship with psychosocial adaptation, further research is necessary to fully comprehend this process.
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The present study examined the impact of the developmental timing of trauma exposure on posttraumatic stress disorder (PTSD) symptoms and psychosocial functioning in a large sample of community-dwelling older adults (N = 1,995). Specifically, we investigated whether the negative consequences of exposure to traumatic events were greater for traumas experienced during childhood, adolescence, young adulthood, midlife, or older adulthood. Each of these developmental periods is characterized by age-related changes in cognitive and social processes that may influence psychological adjustment following trauma exposure. Results revealed that older adults who experienced their currently most distressing traumatic event during childhood exhibited more severe symptoms of PTSD and lower subjective happiness compared with older adults who experienced their most distressing trauma after the transition to adulthood. Similar findings emerged for measures of social support and coping ability. The differential effects of childhood compared with later life traumas were not fully explained by differences in cumulative trauma exposure or by differences in the objective and subjective characteristics of the events. Our findings demonstrate the enduring nature of traumatic events encountered early in the life course and underscore the importance of examining the developmental context of trauma exposure in investigations of the long-term consequences of traumatic experiences.