Image conditions for machine-based face recognition of juvenile faces

Machine-based facial recognition could help law enforcement and other organisations to match juvenile faces more efficiently. It is especially important when dealing with indecent images of children to minimise the workload, and deal with moral and stamina challenges related to human recognition. With growth related changes, juvenile face recognition is challenging. The challenge not only relates to the growth of the child’s face, but also to face recognition in the wild with unconstrained images. The aim of the study was to evaluate how different conditions (i.e. black and white, cropped, blur and resolution reduction) can affect machine-based facial recognition of juvenile age progression. The study used three off-the-shelf facial recognition algorithms (Microsoft Face API, Amazon Rekognition, and Face++) and compared the original images and the age progression images under the four image conditions against an older image of the child. The results showed a decrease in facial similarity with an increased age gap, in comparison to Microsoft; Amazon and Face++ showed higher confidence scores and are more resilient to a change in image condition. The image condition ‘black and white’ and ‘cropped’ had a negative effect across all three APIs. The relationship between age progression images and the younger original image was explored. The results suggest manual age progression images are no more useful than the original image for facial identification of missing children, and Amazon and Face++ performed better with the original image.     

澳大利亚网络安全战略的新内涵与新动向

澳大利亚致力于打造公私部门间"共同领导""共同责任""自我约束"和"自主治理"的网络安全治理新模式,以维护网络空间的安全与稳定、保证国家网络安全、实现数字经济效益的最大化。当前,澳大利亚的网络安全战略正处于转型期,特恩布尔政府在继承既有战略的基础上,对澳大利亚的网络安全战略进行了适时调整,包括增加对"印太地区"的网络安全投入、保持澳美网络安全战略的联动性、提高网络进攻能力以适应互联网军事化需要等。目前,网络空间无政府状态下中美权力的竞争态势正在加剧,澳大利亚的网络安全战略会带有一定的干预主义性质,并向"前沿防御"方向发展。受此影响,澳大利亚的对华网络安全政策可能会面临冲击。但是,中国与澳大利亚的网络安全合作仍在向前发展。虽然中澳网络安全合作仍处于起步阶段,但澳大利亚对中国建设网络强国持欢迎态度,愿意与中国就制定网络行为规范、维护网络空间秩序开展合作。     

大鼠颅骨材料力学和骨质参数的增龄性变化

目的 通过检测大鼠颅骨材料力学和骨质参数,探讨二者关系及其与年龄的相关性.方法 48只健康雄性SD大鼠按年龄分为2、4、6、8、17、26、52和104周龄组,每组6只.利用KDⅡ-0.2型微机控制电子万能试验机压缩右侧颅盖骨检测其材料力学参数(极限载荷、压缩强度、压缩模量),之后分离颅骨骨片进行Micro-CT系统扫...     

Suicide by Close-Range Gunshot Wound to the Bridge of the Nose

Suicidal gunshot wounds to the nasal bridge are rare, particularly at close range (defined as muzzle of the weapon not touching the skin surface, but near enough to deposit soot and stippling). Previously reported suicidal gunshot wounds to the nose have been through the left nostril (Forensic Sci Int 1995;71(1):25–31; J Forensic Radiol Imag 2013;1(2):63–7). The death of a 26-year-old man with a close-range gunshot wound to the bridge of the nose was deemed suicide due to history, scene, and autopsy findings. These findings included previous suicidal ideation, texted and written notes, the decedent's cross-legged position seated on the floor, the trajectory of the bullet through his head and into the ceiling fan and roof above him, and acute alcohol intoxication. This decedent may have been intending a hard contact forehead location but inadvertently fired the gun into the bridge of his nose while bending forward, prior to contact.     

An Analysis of Hounsfield Unit Values and Volumetrics from Computerized Tomography of the Proximal Femur for Sex and Age Estimation

Sex and age are two elements in the establishment of a biological profile for forensic identification. While the pelvic bones are the most ideal structures for sex estimation, the condition of a body is not always ideal due to the nature of death, such as in mass disasters, or postmortem processes. This study utilized CT scans and resultant 3D models of 100 male and 100 female adults of known ages ranging from 18 to 98 years old to collect volumetric and Hounsfield unit measurements of the proximal femur. Equations were created to establish logistic regression models for sex estimation and linear regression models for age estimation. The resultant sex estimation method had an accuracy of 93.5% and utilized the volume of the proximal femur. This study provides three linear regression models for age with an accuracy range of 86%–92% ±12 years. As imaging technologies are increasingly adopted for forensic purposes, the power of 3D data will provide the opportunity for more quantitative and reproducible analyses. The proposed method for sex and age estimation provides a reliable tool that can be utilized in both day-to-day casework and disaster victim identification.     

High-quality Digital 3D Reconstruction of Microscopic Findings in Forensic Pathology: The Terminal Pathway of a Heart Stab Wound*

High-quality digital three-dimensional (3D) reconstructions of microscopic findings have been used in anatomical and histopathologic research, but their use in forensic pathology may also be of interest. This paper presents an application of these methods to better characterize the pathway of a stab wound of the anterior surface of the heart in a case of suicide. A portion of the heart wall including the stab wound was serially sectioned for microscopic analysis along the full extent of the wound. Histologic sections were digitally acquired, and a 3D reconstruction was created with ImageJ software for 3D computer graphics. This showed a full-thickness wound path extending to the endocardial surface of the left ventricle, curvilinear in appearance. After correction for shrinkage, 3D reconstruction allowed estimation of the dimensions of the myocardial injury and comparison of the appearance of the wound with the suspected knife used. The curvilinear appearance was considered to reflect injury during myocardial contraction. Complete microscopic sectioning and 3D reconstruction may allow virtual sectioning through various orientations and also provide useful forensic information for selected injuries.     

义务教育阶段公民受教育权的法律保护

在我国,义务教育阶段长期存在的问题,近年来随着教育体制的改革日益显露,公民的受教育权频繁受到侵害已经成为一个不争事实。政府与公民之间权利义务应当如何配置,这一矛盾将学校置于相对突出的位置。同时,政府与家长应当在何种限度内承担起各自的义务,并以此来保障义务教育的有效实施显得至关重要,因此在立法中明确政府责任与家长对未成年子女照顾权的范围,并施以有效的救济措施,成为真正保障公民享有受教育权所必需的立法前提。     

网络犯罪的心理成因与心理预防

网络犯罪作为一种新型的犯罪,刑法学家、犯罪学家、社会学家、伦理学家等各科专家学者们都从自己的专业角度分析了网络犯罪的成因,提出了预防网络犯罪的手段。同样,网络犯罪也有其自身的心理原因,并可以通过健全心理、矫正心理,达到预防犯罪、减少犯罪的目的。