Rumor spreading in social networks

Social networks are an interesting class of graphs likely to become of increasing importance in the future, not only theoretically, but also for its probable applications to ad hoc and mobile networking. Rumor spreading is one of the basic mechanisms for information dissemination in networks; its relevance stemming from its simplicity of implementation and effectiveness. In this paper, we study the performance of rumor spreading in the classic preferential attachment model of Bollobás et al. which is considered to be a valuable model for social networks. We prove that, in these networks: (a) The standard PUSH-PULL strategy delivers the message to all nodes within O(log²n) rounds with high probability; (b) by themselves, PUSH and PULL require polynomially many rounds. (These results are under the assumption that m, the number of new links added with each new node is at least 2. If m=1 the graph is disconnected with high probability, so no rumor spreading strategy can work.) Our analysis is based on a careful study of some new properties of preferential attachment graphs which could be of independent interest.     

FDDI及其网络规划设计

从参考模型等方面阐述了FDDI标准，讨论了FDDI的主要组网方式，并以实例阐述了网络的规划设计。     

Parental Problem Drinking and Children's Adjustment: Attachment and Family Functioning as Moderators and Mediators of Risk.

Children's perceived attachments with parents, and family cohesion and adaptability were examined as predictors, mediators, and moderators in the parental problem drinking-child outcomes link. A total of 216 6- to 12-year-olds (110 boys, 106 girls) participated. Data were obtained from children and their mothers, fathers, and teachers. A higher level of family cohesion and adaptability functioned as (a) a robust protective factor against adjustment and cognitive difficulties otherwise associated with problem drinking and (b) a mediator of adjustment problems. Children's perceptions of attachments to mothers and fathers were consistent predictors of behavioral, social, and cognitive problems and further moderated relations between problem drinking and child functioning. The results support that child-parent and family functioning variables act as either pathways and/or vulnerability and protective factors for children exposed to a high-risk environment. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Priming Prepositional-Phrase Attachment During Comprehension.

Strong evidence suggests that prior syntactic context affects language production (e.g., J. K. Bock, 1986). The authors report 4 experiments that used an expression-picture matching task to investigate whether it also affects ambiguity resolution in comprehension. All experiments examined the interpretation of prepositional phrases that were ambiguous between high and low attachment. After reading a prime expression with a high-attached interpretation, participants tended to interpret an ambiguous prepositional phrase in a target expression as highly attached if it contained the same verb as the prime (Experiment 1), but not if it contained a different verb (Experiment 2). They also tended to adopt the high-attached interpretation after producing a prime with the high-attached interpretation that included the same verb (Experiment 3). Finally, they were faster to adopt a high-attached interpretation after reading an expression containing the same verb that was disambiguated to the high-attached versus the low-attached interpretation (Experiment 4). (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

磁铅石结构晶体 LaMgAl_(11)O_(19)形态学

沿 a,b 轴生长了 LaMgAl_(11)O_(19)单晶,用 X 射线和光学方法测定了各显露面的密勒指数,利用 Hartman-Perdok 的 PBC 理论,计算了几个重要显露面的吸附能,根据吸附能的大小判断了显露顺序,理论结果与实验相符。     

How self-evaluations relate to being liked by others: Integrating sociometer and attachment perspectives.

What is the relation between self-evaluation and being liked by others? Does being liked by others lead to more positive self-evaluations (as in sociometer theory), or do positive self-evaluations lead to being liked more (self-broadcasting)? Furthermore, what might affect the extent to which self-evaluations are influenced by likability (and vice versa)? The purpose of the present study was twofold. First, it used a naturalistic design to test the direction of the effect between social self-evaluations and others' judgments of likability in real relationships. Second, it examined how individual differences in attachment avoidance and anxiety relate to self-evaluations and likability and whether attachment differences moderate the relation between the two. Social self-evaluations, actual interpersonal liking, and attachment were assessed in participants taking part in a longitudinal group study. The findings supported the sociometer theory: Being liked by others led to more positive self-evaluations. Both anxious and avoidant attachment predicted lower self-evaluations, and anxious attachment predicted stronger reactions to others' liking (i.e., potentiated the sociometer). These findings have several implications for research on selfevaluation, adult attachment theory, and the importance of integrating interpersonal processes and individual differences. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The Adult Attachment Interview and self-reports of attachment style: An empirical rapprochement.

Although 10 studies have been published on the empirical overlap of the Adult Attachment Interview (AAI) and measures of self-reported attachment style, results in this literature have been inconsistently interpreted in narrative reviews. This report was designed as a rapprochement of the AAI and attachment style literatures and includes 3 studies. Study 1 (combined N = 961) is a meta-analytic review showing that by J. Cohen's (1992) criteria (mean r = .09), the association between AAI security and attachment style dimensions is trivial to small. Study 2 (N = 160) confirms meta-analytic results with state-of-the-art assessments of attachment security and also examines attachment dimensions in relation to the Big 5 personality traits. Finally, Study 3 is an investigation of 50 engaged couples that shows that developmental and social psychological measures of attachment security predict somewhat distinct--though theoretically anticipated--aspects of functioning in adult relationships. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Adult attachment and the perception of facial expression of emotion.

Adult attachment orientation has been associated with specific patterns of emotion regulation. The present research examined the effects of attachment orientation on the perceptual processing of emotional stimuli. Experimental participants played computerized movies of faces that expressed happiness, sadness, and anger. Over the course of the movies, the facial expressions became neutral. Participants reported the frame at which the initial expression no longer appeared on the face. Under conditions of no distress (Study 1), fearfully attached individuals saw the offset of both happiness and anger earlier, and preoccupied and dismissive individuals later, than the securely attached individuals. Under conditions of distress (Study 2), insecurely attached individuals perceived the offset of negative facial expressions as occurring later than did the secure individuals, and fearfully attached individuals saw the offset later than either of the other insecure groups. The mechanisms underlying the effects are considered. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

An index of relationship quality based on attachment theory.

Two measures are reported of the nature or quality of a mother-offspring (MO) relationship during development using brown capuchin monkeys (Cebus apella) as models. One is a qualitative classification of MO relationships as secure, resistant, or avoidant attachments. The other is an empirical ratio of relative affiliation to agonism called the MO relationship quality, or MORQ, Index. The two methods tapped similar relationship features so relationships high or low of a median split of MORQ values were heuristically labeled secure (n = 22) or insecure (n = 16), respectively. A comparison revealed extensive behavioral differences between secure and insecure MO relationships and suggested MORQ provided an objective, continuous measure of attachment security. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Internalized homophobia and adult attachment: Implications for clinical practice.

Two hundred eighty-six men and women who identified as lesbian, gay, or bisexual (LGB) were surveyed using measures of attachment, internalized homophobia, shame, and guilt. Results indicated that secure attachment was negatively correlated with internalized homophobia, shame, and guilt. Fearful and preoccupied attachments were positively correlated with these constructs, accounting for 36.9% of the variance in scores. Results are discussed in terms of the therapeutic relationship, with the therapist serving as a secure base for LGB clients working through issues of internalized homophobia and social isolation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)