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21.
Cecile Muller Daniel Shepherd 《Kōtuitui : New Zealand Journal of Social Sciences Online》2013,8(3):225-238
Abstract The aim of this exploratory study was to measure attitudes towards various applications of real and hypothetical reproductive technologies for humans, including prenatal gender selection. A total of 121 undergraduate university students completed a questionnaire measuring knowledge, interest, trust, risks and benefits, and attitudes towards reproductive technologies for humans. An exploratory factor analysis showed that participants rated the use of these technologies as unacceptable if it was for personal enhancement but acceptable for “medically useful” applications. Participants also reported not having a gender preference for their (hypothetical) unborn child, were they to use prenatal gender selection, an application very few approved of. Results failed to support a general desire to use prenatal gender selection or to hypothetically favour one gender over the other. Attitudes towards reproductive technologies cannot be simply summarised in a “pro or against” manner as they heavily depend on the context. 相似文献
22.
《Mobilities》2013,8(6):876-893
ABSTRACTWhile an exploration of mobility patterns in ‘post-conflict’ societies has much to tell us about how division is produced through ordinary activities, less work has considered the practical application of a mobilities ‘lens’ during fieldwork in such contexts. Negotiating the ground in highly polarized contexts presents a unique array of challenges, but also offers opportunities to make use of mobile methodologies. This paper discusses the advantages of GPS-based technologies and walking interviews to a recent activity-space segregation study in Belfast, Northern Ireland, and reflects on methodological issues posed by the ‘post-conflict’ field site. 相似文献
23.
Casey Chung Shun‐Chen Niu Chelliah Sriskandarajah 《Production and Operations Management》2012,21(5):851-873
We develop, in this article, a sales model for movie and game products at Blockbuster. The model assumes that there are three sales components: the first is from consumers who have already committed to purchasing (or renting) a product (e.g., based on promotion of, or exposure to, the product prior to its launch); the second comes from consumers who are potential buyers of the product; and the third comes from either a networking effect on closely tied (as in a social group) potential buyers from previous buyers (in the case of movie rental and all retail products) or re‐rents (in the case of game rental). In addition, we explicitly formulate into our model dynamic interactions between these sales components, both within and across sales periods. This important feature is motivated by realism, and it significantly contributes to the accuracy of our model. The model is thoroughly tested against sales data for rental and retail products from Blockbuster. Our empirical results show that the model offers excellent fit to actual sales activity. We also demonstrate that the model is capable of delivering reasonable sales forecasts based solely on environmental data (e.g., theatrical sales, studio, genre, MPAA ratings, etc.) and actual first‐period sales. Accurate sales forecasts can lead to significant cost savings. In particular, it can improve the retail operations at Blockbuster by determining appropriate order quantities of products, which is critical in effective inventory management (i.e., it can reduce the extent of over‐stocking and under‐stocking). While our model is developed specifically for product sales at Blockbuster, we believe that with context‐dependent modifications, our modeling approach could also provide a reasonable basis for the study of sales for other short‐Life‐Cycle products. 相似文献
24.
Masahiro Nakaoka 《Researches on Population Ecology》1996,38(2):141-152
Recent developments of the theory of stochastic matrix modeling have made it possible to estimate general properties of age-
and size-structured populations in fluctuating environments. However, applications of the theory to natural populations are
still few. The empirical studies which have used stochastic matrix models are reviewed here to examine whether predictions
made by the theory can be generally found in wild populations. The organisms studied include terrestrial grasses and herbs,
a seaweed, a fish, a reptile, a deer and some marine invertebrates. In all the studies, the stochastic population growth rate
(ln λ
s
) was no greater than the deterministic population growth rate determined using average vital rates, suggesting that the model
based only on average vital rates may overestimate growth rates of populations in fluctuating environments. Factors affecting
ln λ
s
include the magnitude of variation in vital rates, probability distribution of random environments, fluctuation in different
types of vital rates, covariances between vital rates, and autocorrelation between successive environments. However, comprehensive
rules were hardly found through the comparisons of the empirical studies. Based on shortcomings of previous studies, I address
some important subjects which should be examined in future studies. 相似文献
25.
红色资源在高校学生党建工作中的功能与运用 总被引:2,自引:0,他引:2
红色资源主要是指中国共产党在领导全国各族人民在长期的革命斗争、建设实践与改革开放的伟大历程中形成的伟大精神及其物质载体,它具有革命性、传承性、先进性、教育性等特点。红色资源是高校学生党建工作的创新载体,其政治教育功能、自我教育功能和文化传播功能在学生党建工作中起到了十分重要的作用,因此,必须充分挖掘和利用红色资源,以进课堂、进校园、进社会的形式创新高校学生党建工作。 相似文献
26.
论述了连方将技术与艺术完美结合的要素及其基本元素组合与打散的过程,展示给人们以变化的乐趣和思维的训练过程。说明了组合后的连方展示的静态美,运用在产品设计中,可以从其外形、结构、文化等方面作为创意,结合现代技术进行新的设计创作,其独特的形式包容着大量的信息,既是装置又非一般装置,既是艺术品又非一般概念之中的艺术品,是一种生发于技术又超越于技术而直达艺术之域的产物。 相似文献
27.
28.
徐玲 《齐齐哈尔大学学报(哲学社会科学版)》2001,(5):103-105
第二语言习得的心理进程有三个,即过滤、组织和监察。影响语言过滤的若干因素,有动机、情感状态、性格、年龄等。变体问题是第二语言习得过程中不可回避的问题,它对第二语习得的确有很大帮助,正确认识这个问题对语言习得和语言教学中的应用都非常有益。 相似文献
29.
The beta-binomial distribution, which is generated by a simple mixture model, has been widely applied in the social, physical, and health sciences. Problems of estimation, inference, and prediction have been addressed in the past, but not in a Bayesian framework. This article develops Bayesian procedures for the beta-binomial model and, using a suitable reparameterization, establishes a conjugate-type property for a beta family of priors. The transformed parameters have interesting interpretations, especially in marketing applications, and are likely to be more stable. More specifically, one of these parameters is the market share and the other is a measure of the heterogeneity of the customer population. Analytical results are developed for the posterior and prediction quantities, although the numerical evaluation is not trivial. Since the posterior moments are more easily calculated, we also propose the use of posterior approximation using the Pearson system. A particular case (when there are two trials), which occurs in taste testing, brand choice, media exposure, and some epidemiological applications, is analyzed in detail. Simulated and real data are used to demonstrate the feasibility of the calculations. The simulation results effectively demonstrate the superiority of Bayesian estimators, particularly in small samples, even with uniform (“non-informed”) priors. Naturally, “informed” priors can give even better results. The real data on television viewing behavior are used to illustrate the prediction results. In our analysis, several problems with the maximum likelihood estimators are encountered. The superior properties and performance of the Bayesian estimators and the excellent approximation results are strong indications that our results will be potentially of high value in small sample applications of the beta-binomial and in cases in which significant prior information exists. 相似文献
30.
EMDR是一种对治疗PTSD和其他创伤经历的心理治疗方法,这种方法的有效性得到了大量实证研究的支持。本文讨论了一些人们常问及的关于EMDR的基本问题,同时引用了一些案例和相关研究来帮助人们更好地理解和学习EMDR。 相似文献