The relationship between perceived ageism and depressive symptoms in later life: Understanding the mediating effects of self-perception of aging and purpose in life,using structural equation modeling     

Hyejin Kim  Bruce A. Thyer  Jean C. Munn 《Educational gerontology》2019,45(2):105-119

The purpose of this study is to examine the relationship between perceived ageism and depression in later life and to clarify the mechanism underlying this relationship by examining the mediating effects of self-perception of aging and purpose in life. The Health and Retirement Study surveys were used for this secondary analysis of data. The sample included 3,991 older adults, and structural equation modeling (SEM) analyses using structural regression models were conducted. SEM analyses revealed that full mediation effects of self-perception of aging and purpose in life exist. Older adults who perceive ageism are likely to have negative self-perception of aging, and this negative view of their own aging is likely to decrease purpose in life and increase depressive symptoms. The results of this study imply that more efforts and resources are necessary to reduce ageism and its negative effect on depression among older adults. Additionally, the current study suggests the necessity of anti-ageism policies and social services. Increasing positive self-perception of aging, purpose in life, and resilience could be the key to a better quality of life for older adults.  相似文献   

美国优质网络课程的案例介绍   总被引：1，自引：0，他引：1  

李艳  Kim E.Dooley  James R.Lindner 《远程教育杂志》2011,29(1):90-95

近十年来,我国高校网络课程建设成果显著,但其中暴露出的理论与实践相脱离的现象也比较严重。通过介绍美国德克萨斯A&M大学Dooley教授开设的网络课程《远程教育的高级方法》,尝试剖析其作为优质网络课程在管理平台、教学设计、交互安排、评价方法以及支持服务等方面所具有的特征,以期与国内远程教育的研究者和实践者分享经验。  相似文献   

我国空间科学卫星任务国际合作管理实践与思考——以中国科学院空间科学战略性先导科技专项为例          下载免费PDF全文

王赤  李超  孙丽琳 《中国科学院院刊》2020,35(8):1032-1040

国际合作是空间科学发展的客观需要,也是我国走近世界空间科学舞台中央的必由之路。中国科学院空间科学战略性先导科技专项(以下简称"空间科学先导专项")的空间科学卫星系列任务在全生命周期的创新发展链条上开展了全面、广泛、全方位、多层次的实质性国际合作,合作伙伴涉及欧洲空间局、欧洲主要航天国家,以及美国、俄罗斯、加拿大、澳大利亚、日本、新加坡等。空间科学先导专项通过建立双边战略研讨机制、共建国际研究机构,促进国际交流与合作,深化任务的国际论证,以及优选先进的科学探测仪器,确保科学目标的原创性和重大性。通过加强合作任务的工程管理和科学管理,实行"项目双首席科学家"和"载荷科学家"模式,促进重大成果产出。文章梳理了空间科学卫星系列任务的国际合作情况,重点阐述对不同层级国际合作的管理实践,对事关国际合作成败的常见问题进行思考并提出了对策建议,力求为后续国际合作任务管理提供重要参考。  相似文献   

Olivine-norite rock detected by the lunar rover Yutu-2 likely crystallized from the SPA-impact melt pool     

Honglei Lin  Zhiping He  Wei Yang  Yangting Lin  Rui Xu  Chi Zhang  Meng-Hua Zhu  Rui Chang  Jinhai Zhang  Chunlai Li  Hongyu Lin  Yang Liu  Sheng Gou  Yong Wei  Sen Hu  Changbin Xue  Jianfeng Yang  Jie Zhong  Xiaohui Fu  Weixing Wan  Yongliao Zou 《国家科学评论(英文版)》2020,7(5):913

Chang’E-4 landed in the South Pole-Aitken (SPA) basin, providing a unique chance to probe the composition of the lunar interior. Its landing site is located on ejecta strips in Von Kármán crater that possibly originate from the neighboring Finsen crater. A surface rock and the lunar regolith at 10 sites along the rover Yutu-2 track were measured by the onboard Visible and Near-Infrared Imaging Spectrometer in the first three lunar days of mission operations. In situ spectra of the regolith have peak band positions at 1 and 2 μm, similar to the spectral data of Finsen ejecta from the Moon Mineralogy Mapper, which confirms that the regolith''s composition of the landing area is mostly similar to that of Finsen ejecta. The rock spectrum shows similar band peak positions, but stronger absorptions, suggesting relatively fresh exposure. The rock may consist of 38.1 ± 5.4% low-Ca pyroxene, 13.9 ± 5.1% olivine and 48.0 ± 3.1% plagioclase, referred to as olivine-norite. The plagioclase-abundant and olivine-poor modal composition of the rock is inconsistent with the origin of the mantle, but representative of the lunar lower crust. Alternatively, the rock crystallized from the impact-derived melt pool formed by the SPA-impact event via mixing the lunar crust and mantle materials. This scenario is consistent with fast-cooling thermal conditions of a shallow melt pool, indicated by the fine to medium-sized texture (<3 mm) of the rock and the SPA-impact melting model [Icarus 2012; 220: 730–43].  相似文献   

Rapid phenotypic evolution with shallow genomic differentiation during early stages of high elevation adaptation in Eurasian Tree Sparrows     

Yanhua Qu  Chunhai Chen  Ying Xiong  Huishang She  Yong E Zhang  Yalin Cheng  Shane DuBay  Dongming Li  Per G P Ericson  Yan Hao  Hongyuan Wang  Hongfeng Zhao  Gang Song  Hailin Zhang  Ting Yang  Chi Zhang  Liping Liang  Tianyu Wu  Jinyang Zhao  Qiang Gao  Weiwei Zhai  Fumin Lei 《国家科学评论(英文版)》2020,7(1):113

Known as the ‘third polar region’, the Qinghai-Tibet Plateau represents one of the harshest highland environments in the world and yet a number of organisms thrive there. Previous studies of birds, animals and humans have focused on well-differentiated populations in later stages of phenotypic divergence. The adaptive processes during the initial phase of highland adaptation remain poorly understood. We studied a human commensal, the Eurasian Tree Sparrow, which has followed human agriculture to the Qinghai-Tibet Plateau. Despite strong phenotypic differentiation at multiple levels, in particular in muscle-related phenotypes, highland and lowland populations show shallow genomic divergence and the colonization event occurred within the past few thousand years. In a one-month acclimation experiment investigating phenotypic plasticity, we exposed adult lowland tree sparrows to a hypoxic environment and did not observe muscle changes. Through population genetic analyses, we identified a signature of polygenic adaptation, whereby shifts in allele frequencies are spread across multiple loci, many of which are associated with muscle-related processes. Our results reveal a case of positive selection in which polygenic adaptation appears to drive rapid phenotypic evolution, shedding light on early stages of adaptive evolution to a novel environment.  相似文献   

Understanding users’ behaviors regarding supply chain technology: Determinants impacting the adoption and implementation of RFID technology in South Korea     

Sanghyun Kim  Gary Garrison 《International Journal of Information Management》2010

Radio Frequency Identification (RFID), once a niche technology, is rapidly gaining the attention of retailers as a key enabler in their supply chain. As RFID moves into the mainstream, it is poised to replace the standard barcode as the technology that identifies and tracks products throughout the supply chain. In an attempt to gain competitive advantages, some retailers have begun the transition to RFID while others have been reluctant to embrace it. This study investigates South Korean retailers to identify key organizational characteristics that positively drive the evaluation of RFID. Further, this study assesses the impact one's evaluation has on the adoption and integration of RFID within their respective firm. Results from 278 adopting organizations show organizational needs (Ubiquity and Performance Gaps), perceived factors (Benefits and Cost Savings), and organizational readiness (Financial Resources and Technological Knowledge) have a significant influence on RFID Evaluation; and evaluation impacts its adoption, and integration.  相似文献   

Now and forever: portraits of qualitative research in Korea     

Young Chun Kim  Jeasik Cho 《International journal of qualitative studies in education》2013,26(3):355-377

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Becoming Co-Authors: Toward Sharing Authority in Religious Education     

Hyun-Sook Kim 《Religious education (Chicago, Ill.)》2013,108(5):479-491

This article offers an alternative model, the model of shared authority, to the traditional, authoritarian model for authority and obedience for Religious Education. This model moves away from the authoritarian model of a teacher as the authority and the students as obedient listeners in the direction of a shared authority model in which teachers and students participate in learning as partners, in other words, “to become co-authors.”  相似文献   

New Vision and Challenges in Inquiry-Based Curriculum Change in Singapore     

Mijung Kim  Frederick Toralballa Talaue 《International Journal of Science Education》2013,35(2):289-311

A new primary science syllabus with strong inquiry focus has been implemented in Singapore since 2008. In this study, we attempted to understand how teachers experience the emphasis of inquiry-based curriculum under the current educational conditions that is routined and highly teacher fronted. We invited 50 pre-service and 41 in-service teachers to participate in survey questionnaires and narratives, reflective writings, and group discussions related to science inquiry which formed our data corpus. Data analysis in the form of thematic coding was carried out using NVivo8, with over 80% inter-rater coding agreement level. Three key aspects of teachers’ perceptions of science inquiry were revealed: (1) teachers’ responsibilities as facilitators, (2) privileging content knowledge rather than process skills, and (3) pressure of assessment systems in current educational contexts. These understandings bring out conflicts of inquiry teaching between teacher- and student-centredness, content and process, and curriculum and assessment. Based on these teachers’ perceptions and dilemmas of inquiry science teaching, the visions and challenges of inquiry science curriculum change against assessment requirements are discussed.  相似文献   

The romance and reality of policy‐making and implementation: a case study of the target‐oriented curriculum in Hong Kong     

Chi Chung Lam 《教育政策杂志》2013,28(6):641-655

One of the major innovations in the recent wave of education reform in Hong Kong is the target‐oriented curriculum. An interesting feature of this new curriculum initiative was its amoebic characteristics – changing shape and focus in its course of development. It was reshaped from an assessment system for accountability purposes to a centrally developed curriculum initiative for improving teaching and learning, and finally to a school‐based curriculum development. In this paper, this course of development and the reasons behind it will be described and analysed. The study suggests that the two‐tier educational policy and implementation system in Hong Kong is a major cause leading to such a phenomenon. If this system were not improved, the possibility of achieving real changes at the school and classroom level would be low.  相似文献