排序方式： 共有57条查询结果，搜索用时 20 毫秒
11.
The “free” in “free software” refers to a cluster of four specific freedoms identified by the Free Software Definition. The
first freedom, termed “Freedom Zero,” intends to protect the right of the user to deploy software in whatever fashion, towards
whatever end, he or she sees fit. But software may be used to achieve ethically questionable ends. This highlights a tension
in the provision of software freedoms: while the definition explicitly forbids direct restrictions on users’ freedoms, it
does not address other means by which software may indirectly restrict freedoms. In particular, ethically-inflected debate
has featured prominently in the discussion of restrictions on digital rights management and privacy-violating code in version
3 of the GPL (GPLv3). The discussion of this proposed language revealed the spectrum of ethical positions and valuations held
by members of the free software community. In our analysis, we will provide arguments for upholding Freedom Zero; we embed
the problem of possible uses of software in the broader context of the uses of scientific knowledge, and go on to argue that
the provision of Freedom Zero mitigates against too great a moral burden—of anticipating possible uses of software—being placed
on the programmer and that, most importantly, it facilitates deliberative discourse in the free software community. 相似文献
12.
13.
14.
15.
Using the Education Watch household survey database, this paper explores children’s access to pre‐school education in Bangladesh. Participation in pre‐school education has been increasing in Bangladesh at the rate of 0.6% per year and the net enrolment rate was found to be 13.4% in 2005. Enrolment of over‐aged children in pre‐school education made the gross enrolment ratio as high as 30.5%. However, over half of the four to five year olds at school were actually enrolled in primary school and not in pre‐school. Moreover, 71% of the four‐ to five‐year group were out of school. Only a third of the four‐ to five‐year‐old children enrolled in schools had the opportunity to attend the English‐medium kindergartens or NGO‐run non‐formal schools, both of which provide better quality pre‐school education. Urban children, especially those with educated parents and from more privileged socio‐economic backgrounds, were more likely to have access to pre‐school education. The lack of a common pre‐school curriculum seems to have created further inequity among children at this very early age. An educational policy targeting poor and socially disadvantaged children with support from both the state and current pre‐school providers is urgently needed to provide four‐ to five‐year‐old children appropriate education for their needs. 相似文献
16.
Altruism, Group Selection and Correlated Interaction 总被引：1，自引：0，他引：1
17.
18.
Multi-Level Selection, Covariance and Contextual Analysis 总被引：2，自引：0，他引：2
19.
Vidya Akhileshwar Samir P. Patel Surendra S. Katyare 《Indian journal of clinical biochemistry : IJCB》2007,22(1):84-90
Studies were carried out to examine and compare the effects of alloxan-diabetes on reactive oxygen species (ROS) related parameters
in the heart from male and female rats. Effects of insulin treatment were also evaluated. The diabetic state severely compromised
the ROS defense mechanism in the cardiac tissue and the effects were more pronounced in the female than in the male rats.
There was several fold increase in the xanthine oxidase (XO) activity in general and the magnitude of increase was higher
in the females; insulin treatment resulted in further increase in the XO activity. The glucose-6-phosphate dehydrogenase (G6PDH)
and catalase activities decreased and the reduced glutathione (GSH) content in mitochondria was completely depleted in diabetic
state with significant decrease in the GSH levels in the post-mitochondrial fraction; the effect was more pronounced in the
females. The superoxide dismutase (SOD) and glutathione peroxidase (GPox) activities increased in the diabetic state to a
greater extent in male rats. Insulin treatment had restorative action only on some parameters. In conclusion, our results
suggest that diabetic state may further compromise the weak ROS defense systems in the heart thus initiating a lesion at the
level of mitochondria which ultimately leads to cardiomyopathy and the effects are especially more pronounced in the females.
Our results also pointed out that insulin treatment was ineffective in restoring ROS related parameters. 相似文献
20.
Factors affecting the motivation to learn among United Arab Emirates middle and high school students
This study was designed to examine the relative contributions of student and parents’ socio‐demographics, students’ beliefs about learning, parental support of children’s learning, peers’ attitudes towards learning, teacher–student interaction and curriculum content to students’ motivation to learn. The sample consisted of 275 school‐age children ranging from 12 to 16 years old. All measures were constructed for the purpose of this study. Hierarchical multiple regression was used to predict student motivation to learn. Results indicated that students’ beliefs about learning, teacher–student interaction and curriculum content contributed to the United Arab Emirates middle and high school students’ motivation to learn. Implications for research are discussed. 相似文献