The Parenting Sense of Competence scale: Evidence of a stable factor structure and validity.

In this study, 110 mothers and 110 fathers of 5- to 12-yr old boys and girls completed the Parenting Sense of Competence (PSOC) scale and measures of child behaviour, parenting style, and marital satisfaction. The authors replicated the factor structure of the Parenting Sense of Competence Scale, and provided evidence that the Satisfaction and Efficacy scales from this measure assess distinct aspects of parenting self-esteem. Interestingly, parents of girls reported higher Efficacy scores than parents of boys. To address the validity of the PSOC scale, we calculated partial correlations between Efficacy and Satisfaction PSOC scores and other measures of family functioning, controlling for the shared variance between the 2 scales. Significant small-to-moderate size correlations were found between parents' reports of both internalizing and externalizing child problems and Satisfaction scores, but correlations with Efficacy scores were generally small and nonsignificant, particularly for mothers. Mothers and fathers who reported a more easy-going, low-conflict parenting style were more satisfied in parenting; for mothers, a similar relationship was found for parenting efficacy. In addition, Satisfaction scores shared a small but significant amount of variance with mother-father agreements in parenting style, as well as marital satisfaction. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Knowledge-Based System Explanation: The Ripple-Down Rules Alternative

The ability to provide explanations has been seen as a key feature of expert systems (ES) typically not offered by other types ofcomputer systems. ES need to offer explanations because ofimprecise domains and the use ofheuristics. Verification is not enough. ES need to justify and be accountable. Explanation is seen as an important activity for knowledge-based systems as it satisfies the user's need to decide whether to accept or reject a recommendation. In this paper we review explanation in first-generation and second-generation ES. An alternative is offered to the main approaches which uses multiple classification ripple-down rules and challenges even the goals of explanation. Instead of trying to give explanations which provide a meaningful line of reasoning and which are tailored to suit the individual it may be just as useful to provide the user with sufficient information and browsing tools to develop their own line of reasoning. The type of information that can assist understanding is the context in which the recommendation applies (which is provided through the display ofrelevant cases and exception rule history) and the ability to explore an abstraction hierarchy of the rules using formal concept analysis. An explanation tool kit aimed at putting the user in control is described and evaluated in this paper. Received 15 January 2001 / Revised 21 June 2001 / Accepted in revised form 1 October 2001     

Food, mood, and attitude: Reducing risk for eating disorders in college women.

Food, Mood, and Attitude (FMA) is a CD-ROM prevention program developed to decrease risk for eating disorders in college women. Female 1st-year students (N = 240) were randomly assigned to the intervention (FMA) or control group. Equal numbers of students at risk and of low risk for developing an eating disorder were assigned to each condition. Participants in the FMA condition improved on all measures relative to controls. Significant 3-way interactions (Time × Condition × Risk Status) were found on measures of internalization of sociocultural attitudes about thinness, shape concerns, and weight concerns, indicating that at-risk participants in the intervention group improved to a greater extent than did low-risk participants. At follow-up, significantly fewer women in the FMA group reported overeating and excessive exercise relative to controls. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Spousal caregiver confidence and recovery from ambulatory activity limitations in stroke survivors.

Objective: This study examined whether spousal confidence in care-recipient recovery can predict recovery from activity limitations following stroke and how spousal confidence relates to stroke survivor self-efficacy for recovery. Design: A prospective design was used. Measures were gathered from stroke survivor/spouse dyads at two time points, both postdischarge from the hospital following stroke (N = 109). Main outcome measures: The dependent variable was recovery from ambulatory activity limitations over 6 weeks, as measured by the Functional Limitations Profile. A single spousal confidence item was tailored to an ambulatory behavior that the stroke survivors could not perform at Time 1. Results: Spousal confidence was correlated with ambulation recovery (r = -0.23, p     

Electrodeposited silicate films: importance of supporting electrolyte

Silica and hybrid organic-inorganic films, ca. 100-200 nm thick, can be grown on glassy carbon electrodes through reactions initiated by electrogenerated hydroxide or hydronium ions in water under reductive and oxidative conditions, respectively. A variety of different alkoxysilanes (tetramethoxysilane and organoalkoxysilanes) and supporting electrolytes were used to evaluate whether film formation takes place on glassy carbon electrodes. The results of the study indicate that the acid-base properties of the supporting electrolyte are an important factor in determining whether film formation will take place. For cathodic electrodeposition, thin films can be formed using supporting electrolytes that are close to neutral, such as KCl, KNO3, and NaClO4. For anodic electrodeposition, thin films can be formed using supporting electrolytes that are acidic, such as, KH2PO4, HNO3, H2SO4, etc. The acidity/basicity effects of the electrolytes arise in part from the strong dependence of the hydrolysis and condensation rates of the silicon alkoxide precursors on pH.     

Don’t believe the hype: a grounded exploratory six country wine purchasing study

The purpose of this exploratory study was to understand the extent that consumers report purchasing wine on mobile devices and to empirically examine potential drivers of m-wine purchasing across six countries to guide theoretical research enquiry moving forward. Purposive sampling was employed. An online survey involving 2853 respondents from France, Germany, Greece, Canada, US and South Africa forms the basis for the current study. The results of the study indicate that though mobile phone usage, wine consumption and purchasing rates are high, mobile-wine purchasing prevalence is low within all six countries. While technology hype has us believe an online presence is essential for business revenue growth and performance; the current study indicates wineries should carefully consider consumer readiness towards mobile-wine purchasing. Limitations and recommendations for future research are identified.     

Effect of smoking regulations in local restaurants on smokers' anti-smoking attitudes and quitting behaviours

Objective

To examine the effect of smoking regulations in local restaurants on anti‐smoking attitudes and quitting behaviours among adult smokers.

Design

Hierarchical linear modelling (HLM) was used to assess the relationship between baseline strength of town‐level restaurant smoking regulation and follow‐up (1) perceptions of the social acceptability of smoking and (2) quitting behaviours.

Setting

Each of the 351 Massachusetts towns was classified as having strong (complete smoking ban) or weak (all other and no smoking restrictions) restaurant smoking regulations.

Subjects

1712 adult smokers of Massachusetts aged ⩾18 years at baseline who were interviewed via random‐digit‐dial telephone survey in 2001–2 and followed up 2 years later.

Main outcome measures

Perceived social acceptability of smoking in restaurants and bars, and making a quit attempt and quitting smoking.

Results

Among adult smokers who had made a quit attempt at baseline, living in a town with a strong regulation was associated with a threefold increase in the odds of making a quit attempt at follow‐up (OR = 3.12; 95% CI 1.51 to 6.44). Regulation was found to have no effect on cessation at follow‐up. A notable, although marginal, effect of regulation was observed for perceiving smoking in bars as socially unacceptable only among smokers who reported at baseline that smoking in bars was socially unacceptable.

Conclusions

Although local restaurant smoking regulations did not increase smoking cessation rates, they did increase the likelihood of making a quit attempt among smokers who had previously tried to quit, and seem to reinforce anti‐social smoking norms among smokers who already viewed smoking in bars as socially unacceptable.Despite the proliferation of restaurant and bar smoking ordinances, very little is known about their specific effects on smokers'' attitudes towards smoking in public places and actual quitting behaviours. The effect of clean indoor air ordinances on smokers is of particular interest given that these types of bans may discourage smoking by strengthening anti‐smoking community norms and in turn influencing quitting behaviours. That is, the social unacceptability of smoking in restaurants and bars may be a potential mechanism in reducing smoking behaviours. Glantz has argued that the tobacco industry''s opposition to restaurant and bar smoking bans is primarily due to the strong message that smoking is no longer socially acceptable.⁶ A recent cross‐sectional study showed that strong local restaurant and bar regulations are associated with more negative attitudes towards the social acceptability of smoking in restaurants and bars among adults who eat out or go out primarily in their towns.⁷ It is known that public smoking restrictions limit smokers'' opportunities to smoke, thus raising the costs of smoking (eg, having to go outside to smoke), which may reduce the perceived benefits of this behaviour (eg, social camaraderie and “pleasure” of smoking a cigarette after a meal).Several studies have shown that smoking restrictions in the workplace encourage smokers to quit or cut back on cigarette consumption.^8,9 According to a recent review of 26 studies on the effects of smoke‐free workplaces across the US, Australia, Canada and Germany, completely smoke‐free workplaces are associated with reductions in prevalence of smoking and fewer cigarettes smoked per continuing smoker.⁹ One study reported that strong local clean indoor air ordinances in California during 1990–1 were associated with an absolute quit rate (over the previous 6 months) 7.6% higher than in areas with no workplace laws.¹⁰ Another study conducted in Canada during the same time period found a 21% reduction in the odds of being a smoker in areas with high coverage versus those with low coverage of smoking bylaws.¹¹ These worksite studies have generally found that completely smoke‐free workplaces are associated with smoking cessation and reduction in cigarette consumption.However, of the 26 studies reviewed by Fichtenberg and Glantz, only two employed longitudinal data and none were specific to restaurants and bar regulations.⁹ The use of cross‐sectional data prevents determination of whether the regulations caused the reduced smoking or whether states and towns with lower smoking rates are more likely to adopt such regulations. These studies are also limited by their failure to control for town‐level factors that may confound the relationship between the presence of regulations and the observed levels of smoking. Furthermore, the few studies reviewed grouped together different smoking restriction sites (eg, worksites, schools, restaurants, public places), and assessed only state‐level rather than local laws.Another limitation of current research is that none has investigated how restaurant smoking regulations influence smokers'' attitudes and behaviours by existing attitudes towards smoking and smokers'' quitting behaviour. Smoking regulations in restaurants may have a stronger effect on smokers who have begun to change their perception of the social unacceptability of smoking in public places and on smokers who are already motivated to quit. Most research efforts have assumed homogeneity in attitudes and behaviours by examining the effect of bans on all adults and all smokers. Prochaska et al^12,13, for example, have characterised quitting as a process, with smokers classified according to their stage of change from precontemplation (earliest stage) to maintenance (last stage). A large variation exists in the quitting process—smokers often do not exhibit a steady progression through this change sequence¹⁴ and achievement of successful cessation often includes regression to a previous stage.¹⁵ Additionally, two obvious reasons for the limited research are the small samples used in many studies and the lack of longitudinal data to support stratified analyses. These data allowed us to investigate in detail heterogeneity in smoking regulation effects across attitudes and quitting behaviours among a smoker cohort.To help address the weaknesses of previous research, our study focused on the effect of smoking regulations over the 2‐year follow‐up period on two outcomes: (1) anti‐smoking attitudes among smokers who did or did not report anti‐smoking attitudes at baseline and (2) quitting behaviours among smokers who had or had not made a past year quit attempt at baseline. To our knowledge, this is the first longitudinal study to assess the effect of restaurant smoking restrictions on smokers'' attitudes towards smoking in restaurants and bars, quit attempts and actual quitting behaviour.     

What do adults in Prince Edward Island know about nutrition?

PURPOSE: To assess adults' knowledge of dietary recommendations, food sources of key nutrients, food choices, and diet-disease relationships. METHODS: A previously validated survey, designed to assess nutrition knowledge, was adapted for use in Prince Edward Island and mailed to a random sample of 3,500 adults (aged 18 to 74). Dillman's Total Design Method was followed and a response rate of 26.4% achieved. Mean scores and 95% confidence intervals (CIs) were calculated for the overall survey and for each section. Demographic variations were assessed by univariate analysis. RESULTS: Of an overall possible score of 110 points, the mean score with 95% CI was 71.0 (70.1, 71.9). Respondents scored higher on the sections on dietary recommendations, food sources, and food choices than diet-disease relationships. Demographic differences existed in gender, age, education, and income. Findings suggest that adults have good general knowledge of dietary recommendations, but lack knowledge about how to make healthier food choices and the impact of diet on disease risk. CONCLUSION: When designing intervention strategies, dietitians should consider targeted messages to provide adults with the information they need to make healthy food choices.     

Optimal harvest timing for brown midrib forage sorghum yield,nutritive value,and ration performance

Forage sorghum [Sorghum bicolor (L.) Moench] is a viable alternative to corn silage (Zea mays L.) in double cropping rotations with forage winter cereals in New York due to a later planting date and potentially earlier harvest date of forage sorghum than is typical for corn silage. Our objective was to determine whether harvest of brachytic dwarf brown midrib forage sorghum can take place before the currently recommended soft dough harvest time while maintaining dry matter (DM) yield, forage nutritive value, and total mixed ration performance. Seven trials were conducted on 2 research farms in central New York from 2014 to 2017. Forage sorghum received 1 of 2 fertilizer N rates at planting (112 and 224 kg of N/ha). Stands were harvested at boot, flower, milk, and soft dough stages. Forage samples were analyzed for nutritive value and substituted for corn silage in a typical dairy total mixed ration at varying amounts using the Cornell Net Carbohydrate and Protein System. Timing of harvest affected yield and forage nutritive value for each individual trial and across trials, and the effects were independent of N fertilizer application rate. Averaged across trials, yield ranged from 10.7 Mg of DM/ha for the boot stage to 13.5, 15.2, and 15.8 Mg of DM/ha for the flower, milk, and soft dough stages, respectively. For individual trials, yield either remained constant with harvest beyond the flower stage (4 trials), or beyond the milk stage (1 trial), whereas for 2 trials yield increased up to the soft dough stage. At the later harvest stages, DM, starch, and nonfiber carbohydrates were increased, whereas crude protein, neutral detergent fiber, and 30-h neutral detergent fiber digestibility were decreased. Without adjusting for DM intake, substitution of corn silage by forage sorghum harvested at the soft dough stage resulted in stable predicted metabolizable energy allowable milk, whereas the reduced starch content of earlier harvested sorghum resulted in less metabolizable energy allowable milk with greater substitution of corn silage for sorghum. Forage sorghum can be harvested as early as the flower or milk stage without losing DM yield, allowing for timely planting of forage winter cereal in a double cropping rotation. However, energy supplementation in the diet is needed to make up for reduced starch concentrations with harvest of sorghum at flower and milk growth stages.     

防止黑客侵入 VoIP安全机制防微杜渐

随着Voice over IP(VoIP)技术在全球电信市场不断普及,性能、功能支持及成本降低等方面的进步已经使它受到了服务提供商、设备厂商以及最终用户的青睐.而随着人们重视程度的不断提高,语音通信的安全性逐渐发展成为VoIP解决方案的要素.本文将从软硬件两方面探讨这个问题.