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121.
Wun-Tat Chan Francis Y. L. Chin Yong Zhang Hong Zhu Hong Shen Prudence W. H. Wong 《Journal of Combinatorial Optimization》2006,11(2):177-187
We study the problem of (off-line) broadcast scheduling in minimizing total flow time and propose a dynamic programming approach
to compute an optimal broadcast schedule. Suppose the broadcast server has k pages and the last page request arrives at time n. The optimal schedule can be computed in O(k3(n+k)k−1) time for the case that the server has a single broadcast channel. For m channels case, i.e., the server can broadcast m different pages at a time where m < k, the optimal schedule can be computed in O(nk−m) time when k and m are constants. Note that this broadcast scheduling problem is NP-hard when k is a variable and will take O(nk−m+1) time when k is fixed and m ≥ 1 with the straightforward implementation of the dynamic programming approach.
The preliminary version of this paper appeared in Proceedings of the 11th Annual International Computing and Combinatorics
Conference as “Off-line Algorithms for Minimizing the Total Flow Time in Broadcast Scheduling”. 相似文献
122.
Environmental issues have become critical concerns of businesses in recent years. The Singapore Environment Ministry is urging organizations to consider adopting the ISO 14000 Environmental Management Standards. The main purpose of this study was to investigate and identify a number of variables which would be able to predict the motivation of organizations in adopting the ISO 14000 Standards. Through extensive literature search eight possible predictive variables/factors (cost savings, top management concern, employee welfare, meeting environmental regulations, meeting customer expectations, concern over trade barriers, following head office environmental practices, and gaining competitive advantages) were identified. In total, 300 pre-tested survey questionnaires were mailed out to companies from the Electronic and Chemical industries in Singapore. A response rate of about 20% was obtained. The survey instrument was tested for reliability and validity. Using stepwise discriminant analysis, a predictive discriminant function was developed. Only four out of the originally identified eight variables were included in the model. Possible benefits of such a model for Singapore and other industrializing countries are highlighted. 相似文献
123.
Marissa L. Diener Russell A. Isabella Melissa G. Behunin Maria S. Wong 《Social Development》2008,17(1):84-101
Attachment relationships of first, third, and fifth graders with their mothers and fathers, and their associations with self‐perceived and teacher‐rated competence, were investigated. Children rated their attachment security with mothers and fathers using the Kerns security scale. Children's perceptions of academic and peer competence were measured using Harter's self‐perception profile, and teachers also rated children's competence. Girls felt greater attachment security to their mothers than to their fathers, and boys felt greater attachment security to their fathers than did girls. Greater attachment security with both mothers and fathers was associated with children's perceptions of greater peer and academic competence, and this association was stronger for older children. A greater sense of attachment security with both parents was associated with greater competence than a sense of attachment security with only one parent. Teacher‐rated competence was significantly related to attachment security with mothers but not fathers. 相似文献
124.
Hung Wong 《Social indicators research》2011,100(3):435-450
Based on three surveys carried out for studying living conditions of youth, women and elderly living in six remote areas (Tuen
Mun, Yuen Long, Tin Shui Wai, Sheung Shui, Fan Ling and Tai Po) in the New Territories of Hong Kong, this paper reports the
poverty and social exclusion of these three groups of people. The quality of life of youth, women and elderly is adversely
affected by limited job opportunities, high cost of travel for employment, and poor neighbourhoods in the community. However,
perceptions of reasons for their problems are different for the three groups, due to differences in bonding and bridging social
capital they have, as well as the differences in perceptions on social exclusion and discrimination directed upon them. 相似文献
125.
126.
Wong Jade Ortmann Andreas 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2016,27(2):958-978
VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - We study how donors decide about which charity to give to. To this end, we construct a theoretical model that clarifies... 相似文献
127.
Yat Yin Eric Wah Margaret McGill Jencia Wong Glynis P. Ross Anna-Jane Harding Ines Krass 《Women and birth : journal of the Australian College of Midwives》2019,32(1):e17-e23
Background
Gestational diabetes mellitus is one of the most common complications of pregnancy. Women with Gestational diabetes are at increased risk of serious health outcomes, such as pre-eclampsia, obstructed labor, and the development of Type 2 diabetes later in life. Chinese migrants, the third largest cultural group in Australia, are more likely to develop Gestational diabetes than Australian-born women. However, to date, Gestational diabetes self-management has not been investigated in this population.Aim
To explore the understanding and self-management experiences of Gestational diabetes among Chinese migrants.Methods
Data were collected through individual semi-structured face-to-face interviews. Participants were recruited from the antenatal clinic at the Royal Prince Alfred Hospital. Interviews were audio-recorded, transcribed verbatim and thematically analyzed.Findings
Although the majority of participants demonstrated a good understanding of Gestational diabetes, some did not understand the principles behind healthcare advice and faced challenges in self-management. Confusion about self-monitoring of blood glucose and fear of insulin were also evident. Participants relied on both formal and informal sources of information. Some had difficulty obtaining adequate support. Cultural influences on self-management included meeting family needs, Chinese diet and use of Chinese medicines.Conclusion
To assist Chinese women with Gestational diabetes to better self-manage their condition, there is a need for clinicians to: (1) provide more effective diabetes education to ensure clear understanding of self-management principles; (2) actively elicit and respond to women’s confusion and concerns; (3) provide women with adequate practical support; and (4) develop greater cultural awareness. 相似文献128.
129.
Rural migrant workers in urban China: living a marginalised life 总被引:3,自引:0,他引:3
Daniel Fu Keung Wong Chang Ying Li He Xue Song 《International Journal of Social Welfare》2007,16(1):32-40
The rural migrant worker population in China is attracting more and more attention because of its magnitude and potential economic and social impact on Chinese society. While literature abounds in describing the demographic trends and economic impacts of rural to urban migration, very few articles have been written about the psychosocial impacts of migration on the lives of rural migrant workers in urban China. Drawing on the concept of marginalisation, this article describes the nature and characteristics of marginalised living experienced by migrant workers. More importantly, it examines the underlying policy issues contributing to such marginalised living. It is argued that the Hukou system (household registration system), the process of decentralisation and the obscure role of trade unions have contributed to the experience of marginalisation of rural migrant workers in urban cities in China. Implications for policy changes are also discussed. 相似文献
130.