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排序方式: 共有102条查询结果,搜索用时 18 毫秒
1.
Brody Gene H.; Ge Xiaojia; Kim Su Yeong; Murry Velma McBride; Simons Ronald L.; Gibbons Frederick X.; Gerrard Meg; Conger Rand D. 《Canadian Metallurgical Quarterly》2003,71(2):211
Data from 296 sibling pairs (mean ages 10 and 13 years), their primary caregivers, and census records were used to test the hypothesis that African American children's likelihood of developing conduct problems associated with harsh parenting, a lack of nurturant-involved parenting, and exposure to an older sibling's deviance-prone attitudes and behavior would be amplified among families residing in disadvantaged neighborhoods. A latent construct representing harsh-inconsistent parenting and low levels of nurturant-involved parenting was positively associated with younger siblings' conduct disorder symptoms, as were older siblings' problematic attitudes and behavior. These associations were strongest among families residing in the most disadvantaged neighborhoods. Future research and prevention programs should focus on the specific neighborhood processes associated with increased vulnerability for behavior problems. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
2.
This paper proposes a high capacity audio watermarking algorithm in the logarithm domain based on the absolute threshold of hearing of the human auditory system (HAS), which makes this scheme a novel technique. When considering the fact that the human ear requires more precise samples at low amplitudes (soft sounds), the use of the logarithm helps us design a logarithmic quantization algorithm. The key idea is to divide the selected frequency band into short frames and quantize the samples based on the HAS. Using frames and the HAS improves the robustness, since embedding a secret bit into a set of samples is more reliable than embedding it into a single sample. In addition, the quantization level is adjusted according to the HAS. Apart from remarkable capacity, transparency and robustness, this scheme provides three parameters (frequency band, scale factor and frame size) which facilitate the regulation of the watermarking properties. The experimental results show that the method has a high capacity (800–7,000 bits per second), without significant perceptual distortion (ODG >1) and provides robustness against common audio signal processing such as added noise, filtering and MPEG compression (MP3). 相似文献
3.
Identifying and integrating patient and caregiver perspectives for clinical practice guidelines on the screening and management of infectious microorganisms in hemodialysis units 下载免费PDF全文
Hilary M. Miller Allison Tong David J. Tunnicliffe Denise Campbell Jule Pinter Robert J. Commons Eugene Athan Jonathan C. Craig Nicole Gilroy Julianne Green Belinda Henderson Martin Howell Rhonda L. Stuart Carolyn van Eps Muh Geot Wong Janak de Zoysa Meg J. Jardine 《Hemodialysis international. International Symposium on Home Hemodialysis》2017,21(2):213-223
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Exercise training-induced changes in sensitivity to endothelin-1 and aortic and cerebellum lipid profile in rats 总被引:2,自引:0,他引:2
Latorre E Morán M Aragonés MD Saborido A Fernández I Delgado J Catalán RE Megías A 《Lipids》2002,37(1):43-52
The purpose of this work was to study whether exercise training induces changes in the lipid profile of rat aorta and nervous
system and in the in vitro intrinsic responsiveness of these tissues to endothelin-1 (ET-1) treatment. The exercise program performed successfully produced
the characteristic metabolic alterations of the trained state. Exercise training induced a large and significant increase
in the levels of both aortic ethanolamine plasmalogens (PlasEtn) and glucosylceramides. In contrast, a decrease of aortic
ceramide and cholesterol levels was evoked by exercise training. ET-1 increased PlasEtn content only in sedentary animals.
An exercise-induced increase in cerebellum levels of ceramides and ceramide monohexosides was found. The cerebellum ceramide
content was increased by FT-1 more noticeably in sedentary rats than in trained animals. In contrast, cerebral cortex was
observed to be largely insensitive to both exercise training and ET-1 treatment. It was concluded that exercise training (i)
induces changes in both vascular and cerebellar lipid profiles, the former being much more pronounced than the latter, and
(ii) diminishes the aortic and cerebellar sensitivity to ET-1 action. 相似文献
6.
Cristina Megías Elena Pastor-Cavada Cristina Torres-Fuentes Julio Girón-Calle Manuel Alaiz Rocio Juan Julio Pastor Javier Vioque 《European Food Research and Technology》2009,230(2):353-359
The metal chelating activity, antioxidant properties, and the effect on cell growth of a polyphenol extract from Vicia sativa have been investigated, and compared to those of soybean. The extracts from V. sativa seeds contained three and five times more polyphenols and flavonoids than soybean, respectively. The soybean polyphenol extracts
showed higher copper and iron chelating activity than those from V. sativa, although polyphenols from V. sativa were more effective in preventing β-carotene oxidation and showed higher reducing power and scavenging activity than soybean
polyphenols. In addition, V. sativa polyphenols were toxic to THP-1 leukemic cells, as opposed to polyphenols extracted from soybean that did not show any antiproliferative
activity at similar concentrations. In conclusion, V. sativa polyphenol extracts show promising antioxidant and antiproliferative activities that may be of interest from a functional
point of view and for the revalorization of this ancient crop. 相似文献
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Jeong Yeob Han Ph.D. Meg Wise Ph.D. Eunkyung Kim Ph.D. Candidate Ray Pingree Ph.D. Robert P. Hawkins Ph.D. Suzanne Pingree Ph.D. Fiona McTavish M.S. David H. Gustafson Ph.D. 《Journal of Computer-Mediated Communication》2010,15(3):367-388
In order to provide insights about cancer patients' online information seeking behaviors, the present study analyzes individuals' transaction log data and reports on how demographics, disease‐related factors, and psychosocial needs predict patterns of service use within a particular Interactive Cancer Communication System (ICCS). Study sample included 294 recently diagnosed breast cancer patients. Data included pretest survey scores of demographic, disease‐related, and psychosocial factors and automatically collected ICCS use data over the 4‐month intervention. Statistical analyses correlated pre‐test survey scores with subsequent, specific types of ICCS service usage. Patterns of online cancer information seeking differed according to the patients' characteristics, suggesting that lower income, less educated women and those lacking in information‐seeking competence use the computer and online services to the same or a greater degree if those services are made available to them. Results of this study can inform more effective resource development for future eHealth applications. 相似文献
9.
This article's major objective is to effectively prepare the graduate student in psychology for the internship application process by providing critical and relevant information. Preparation begins early on in one's graduate career and usually involves the following steps: (a) establishing mentoring relationships, (b) preparing an application portfolio, (c) collecting information, (d) applying, (e) interviewing, (f ) ranking the selected agencies, and (g) responding on selection day. Information is also provided on how to use the Association of Psychology Postdoctoral Internship Centers (APPIC) Clearinghouse. Finally, a brief section is devoted to the process of choosing a non-APPIC site. Advance preparation can make this entire process easier and increase a student's chance of finding a suitable predoctoral internship in psychology. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
10.
Gibbons Frederick X.; Gerrard Meg; Lane David J.; Mahler Heike I. M.; Kulik James A. 《Canadian Metallurgical Quarterly》2005,24(4):358
Two laboratory studies were conducted in which a new type of intervention was used to reduce ultraviolet radiation (UV) exposure from tanning booth use among college students (Time 1 Ns=70 and 134). The intervention uses UV photography to highlight the damage to facial skin caused by previous UV exposure. When the authors controlled for baseline measures of booth use, students in both studies who viewed their UV photographs reported less booth use at a follow-up session 3-4 weeks later than did students not shown a copy of their photograph. Also, in both studies, the decline in use was significantly mediated by a Tanning Cognition Index composed of variables suggested by the prototype-willingness (prototype) model of health risk: tanning attitudes, tanner prototypes, and willingness to engage in risky UV exposure. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献