The growing public health concern of sports concussion: The new psychology practice frontier.

With youth participation in sports at an all-time high, youths have become more vulnerable to the silent epidemic of concussion. Psychologists should become aware of the alarming frequency of mild concussion and the subtle effects of concussion, which often go unnoticed or result in misdiagnosis. This article provides a basic survey of the research and literature on this topic, a simplified knowledge base for understanding updated assessment and management techniques, and a discussion of the important role psychologists can play in educating the public and their patients. Practitioners can become more aware of this developing practice opportunity. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

大容量电弧炉负荷对电网的影响及其防范措施

着重分析了大容量电弧炉冲击负荷的特点,为了保障电力系统自身的安全可靠运行,应根据电弧炉负荷的特点在进行相关的电气设备选型和运行管理中采取适宜的防范措施,尽量减小大容量电弧炉冲击负荷对电网的影响。     

爆破振动对露天矿边坡稳定性影响分析

本文根据爆破振动试验成果,从爆破地震波频率分析、波延时间、振速衰减规律回归、最大一段起爆药量等方面给出了分析。评价了当次爆破对边坡稳定性的影响,初步揭示了该矿山一般生产爆破振动衰减规律,同时有针对性的提出了穆利亚希露天矿边坡防护在工程爆破时宜采取的主要措施。     

简析当前经济金融严峻形势对制盐企业的影响和对策

本文解析了当前经济金融严峻形势对制盐企业的影响和冲击,盐产品需求明显减少;盐产品价格明显下降;制盐企业经济效益明显下滑;提出了从容应对,化解风险的对策和建议,强化内部管理,严格控制成本,提升核心竞争力。     

关于医用超声波雾化器性能改进的探讨

阐述的主要内容有以下4个,介绍了超声波雾化器的应用范围,指出了用超声波雾化器治疗疾病特点,本文还乐观地估计了超声波雾化器的应用前景;介绍了超声波雾化器的基础电路,并对其工作原理进行了简要的分析;指出了一些超声波雾化器产品的某些不足之处,并提出了相应的改进措施;指出了提高超声波雾化器的雾化量的必要性,并就提高大功率超声波雾化器工作稳定性的技术问题进行分析与探讨.     

The Relationship between Sport-Related Concussion and Sensation-Seeking

Sensation-seeking, or the need for novel and exciting experiences, is thought to play a role in sport-related concussion (SRC), yet much remains unknown regarding these relationships and, more importantly, how sensation-seeking influences SRC risk. The current study assessed sensation-seeking, sport contact level, and SRC history and incidence in a large sample of NCAA collegiate athletes. Data included a full study sample of 22,374 baseline evaluations and a sub-sample of 2037 incident SRC. Independent samples t-test, analysis of covariance, and hierarchical logistic regression were constructed to address study hypotheses. Results showed that (1) among participants without SRC, sensation-seeking scores were higher in athletes playing contact sports compared to those playing limited- or non-contact sports (p < 0.001, R² = 0.007, η²_p = 0.003); (2) in the full study sample, a one-point increase in sensation-seeking scores resulted in a 21% greater risk of prior SRC (OR = 1.212; 95% CI: 1.154–1.272), and in the incident SRC sub-sample, a 28% greater risk of prior SRC (OR = 1.278; 95% CI: 1.104–1.480); (3) a one-point increase in sensation-seeking scores resulted in a 12% greater risk of incident SRC among the full study sample; and (4) sensation-seeking did not vary as a function of incident SRC (p = 0.281, η²_p = 0.000). Our findings demonstrate the potential usefulness of considering sensation-seeking in SRC management.     

Postdeployment traumatic brain injury screening questions: Sensitivity, specificity, and predictive values in returning soldiers.

Objective: To evaluate the sensitivity, specificity, and predictive values of Post-Deployment Health Assessment traumatic brain injury (TBI) screening questions employed by the Department of Defense (DOD). Participants: Complete data was obtained from 3,072 soldiers upon return from a 15-month deployment to Iraq. Method: Comparisons were made between responses to the DOD four-item screener and a brief structured clinical interview for likely deployment-related TBI history. The interview process was facilitated using responses to the Warrior Administered Retrospective Casualty Assessment Tool (WARCAT). Results: The sensitivity and specificity of the DOD screening tool (positive response to all four items) in comparison to the clinician-confirmed diagnosis was 60% and 96%, respectively. The sensitivity increased to 80%, with a slight decrease in specificity to 93%, for positive TBI screening when affirmative responses to questions 1 and 2 only were included. Conclusions: Affirmative responses to questions 1 and 2 of the DOD TBI screening tool demonstrated higher sensitivity for clinician-diagnosed deployment-related TBI. These two items perform better than positive responses to all four questions; the criteria presently being used for documentation and referral of a deployment-related TBI. These findings support further exploration of TBI screening and assessment procedures. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Theranostic Oxygen Reactive Polymers for Treatment of Traumatic Brain Injury

Traumatic brain injury (TBI) is the leading cause of disability and death in children and adults under 45, with approximately ten million new cases per year worldwide. Significant progress has been made in understanding the complex pathophysiological response to TBI; however, reducing the damage associated with the reactive oxygen species (ROS)‐dependent secondary phase of the injury remains a substantial challenge. The development of an image‐guided, Gd‐conjugated, oxygen reactive polymer (ORP) to reduce ROS levels in damaged brain tissue is reported. ORP effectively sequesters ROS while remaining biocompatible even at elevated concentrations. ORP is retained in damaged brains of controlled cortical impact (CCI) mouse models of TBI for over 24 h when injected intravenously immediately and up to 3 h post‐CCI. The polymer reduces neurodegeneration tenfold and gliosis twofold in these mouse models. ORP shows initial promise as an effective therapy for TBI and helps provide a better understanding of nanomaterial interaction with damaged brain.     

液压设备故障分析与处理措施

介绍了钢铁厂液压设备出现的几种主要的故障及其危害,分析其产生的原因、处理方法以及应采取的措施。     

Delayed-Onset Deficits in Verbal Encoding Strategies Among Patients With Mild Traumatic Brain Injury.

Knowledge obtained from longitudinal animal models was used to predict the course of verbal memory deficits in 19 concussed patients and 19 control patients who were given versions of the Hopkins Verbal Learning Test--Revised at 2 hr, 48 hr, and 1 week postconcussion. The physiological literature suggests that concussed patients should exhibit a decline in performance from 2 hr to 48 hr postconcussion on a measure of complex memory strategies. Consistent with this hypothesis, mixed-factor analysis of covariance revealed that concussed patients used less semantic clustering strategies than control patients at 48 hr postconcussion, whereas minimal differences were found at 2 hr postinjury. Furthermore, a chi-square analysis showed that a significant number of concussed patients experienced a decline in the number of semantic clusters they used from 2 hr to 48 hr. No differences were found between the groups at the 1-week testing session. (PsycINFO Database Record (c) 2010 APA, all rights reserved)