Descrambling data on solid-state disks by reverse-engineering the firmware

Data recovery is an important component of digital forensic research. Although recovering data from hard drives or small-scale mobile devices has been well studied, solid-state disks (SSDs) have a very different internal architecture and some additional functions, and it is not clear whether these differences will have an effect on data recovery. Data scrambling is an additional function of an SSD controller which can improve data reliability, but makes data recovery difficult. In this research, the dedicated flash software was first introduced that can acquire the physical image of an SSD without destroying the device hardware. Based on the software, a validation experiment was presented to evaluate the effect of data scrambling on data recovery and the causes of the effect were analyzed. Then two approaches to descrambling the data in the flash chips were proposed and their advantages and disadvantages discussed. After that, a procedure to identify the scrambling seeds that are used to descramble the scrambled data was described. Finally, descrambling software was implemented based on the second descrambling method. The experiment shows that this software can successfully descramble the data from an SSD flash drive regardless of the internal structure of the scrambler in the SSD controller and can generate an unscrambled physical image on which most existing data-recovery techniques can be effective.     

Human (In)Security and Democracy in Central America

Human security has increasingly shifted attention to the individual, while the state has become guarantor (or violator) of security given its role in governing the domestic environment. This article examines how variations in regime forms influence security, pointing to the importance of political security in the wider human security framework. To illustrate, the article examines the nature of political security in Central America, a region with weakly democratized states and histories of political violence. The findings suggest a link between democracy and human security that is mediated by state capacity and the ability to control non-state violence against individuals.     

正确对待高校的体育教学和课余训练

体育教学与课余训练是全体与个体、普及与提高、面向全体与发展特长的关系 ,在高校体育工作中都必须加以重视 ,不能只重视某一个方面而疏忽另一个方面。在教学过程中 ,要协调好两者的关系 ,实现以教学带动训练 ,以训练促进教学的良性循环 ,全面完成学校的体育工作。     

STRUCTURAL INEQUALITY AND HOMICIDE: AN ASSESSMENT OF THE BLACK‐WHITE GAP IN KILLINGS*

This paper examines the relationship between race and violent crime by directly modeling the racial gap in homicide offending for large central cities for 1990. We evaluate the role of black‐white differences in aspects of both disadvantage and resources in explaining which places have wider racial disparities in lethal violence. The results show that where residential segregation is higher, and where whites' levels of homeownership, median income, college graduation, and professional workers exceed those for blacks to a greater degree, African Americans have much higher levels of homicide offending than whites. Based on these results, we conclude that the racial homicide gap is better explained by the greater resources that exist among whites than by the higher levels of disadvantage among blacks.     

色彩平衡：从物理概念到色调控制

基于计算机屏幕、基于人眼与基于印刷品的色彩有着不同的物理属性。进行图像设计时要针对不同的应用领域,正确把握色彩的物理性质,选择恰当的色彩模式,对色调进行准确控制,避免输出作品时产生的缺色和溢色现象,以达到最佳色彩平衡。     

论暴力取证罪罪名的确定及构成特征

暴力取证罪是指司法工作人员使用暴力逼取证人证言的行为。是97刑法典中的新增罪名,其罪名的确定是恰当的,此罪在客体、客观方面,主体、主观方面的特征均有争议,须予以澄清。     

Relationships Between Adult Women’s Mental Health Problems and their Childhood Experiences of Parental Violence and Psychological Aggression

We used the Parent-Child Conflict Tactics Scales (M. A. Straus, S. L. Hamby, D. Finkelhor, D. W. Moore, & D. Runyan, 1998) to assess retrospectively women’s childhood experiences of both mother and father physical abuse and psychological aggression, and assessed mother and father alcohol problems based on criteria derived from the Family History Research Diagnostic Criteria (N. C. Andreasen, J. Endicott, R. L. Spitzer, & G. Winokur, 1977). Data were collected from 447 women (age 18 or higher) from seven domestic violence programs and five substance use disorder treatment programs in a midwestern state. Using OLS regression with backward elimination (p < .10 as criterion for removal from the equation) we found that higher levels of mother physical abuse, father psychological aggression, and presence of mother alcohol problems predicted higher scores on the Beck Anxiety Inventory and Trauma Symptom Checklist. Higher levels of mother physical abuse and father psychological aggression predicted higher scores on the Beck Depression Inventory. Implications for research and practice are discussed.

Constitutional reform and new patterns of electoral violence: evidence from Kenya’s 2013 elections

In places prone to electoral violence, what effects can constitutional changes have on elites’ incentives to organise conflict? This article develops two hypotheses to address the above question. It proposes that in places where national reforms find sub-national resonance, national and local politicians’ incentives regarding the electoral utility of conflict will align. However, in places where national-level changes fail to be locally relevant, these incentives will deviate from one another. The research illustrates these logics through a controlled comparison of two Kenyan counties: one that experienced electoral violence and the other that maintained peace around the 2013 elections.     

Catching Them Before Too Much Damage is Done: Early Intervention with Resistance‐Refusal Dynamics

Children often need help before their parents are ready to stop fighting. Children at the center of high‐conflict disputes, particularly those who resist contact with a parent, face extraordinary risks of maladjustment. Years of investigation and litigation may precede any meaningful attempt at intervention, based on the questionable belief that all elements of causality (or blame) must be established before any effective treatment can occur. Children's functioning may continue to deteriorate during this time, undermining their future adjustment and reducing the chance of successful intervention later. We illustrate the application of the coping‐focused, multisystemic Child Centered Conjoint Therapy model to assisting these families. Methods to assist children without compromising external investigations are discussed.