Visualization of Aged Fingerprints with an Ultraviolet Laser

Detection of aged fingerprints is difficult because they can degrade over time with exposure to light, moisture, and temperature. In this study, aging fingerprints were visualized by time‐resolved spectroscopy with an ultraviolet‐pulsed laser. Fingerprints were prepared on glass slides and paper and then stored under three lighting conditions and two humidity conditions for up to a year. The fluorescence intensities of the fingerprints decreased with time. Samples were stored in the dark degraded less than in sunlight or under a fluorescent lamp. Samples were stored under low humidity degraded less than under moderate humidity. As the storage period increased, a fluorescence emission peak appeared that was at a longer wavelength than the peak visible in earlier spectra. This peak was used for visualization of an aged fingerprint over time. An image of the fingerprint was not initially visible, but an image appeared as the time since deposition of the fingerprint increased.     

Stopping the Cycle of Child Abuse and Neglect: A Call to Action to Focus on Pregnant and Parenting Youth in and Aging Out of the Foster Care System

Each year, a significant number of adolescents become pregnant in the United States, with more than half of these pregnancies resulting in live births. Adolescent parenting is associated with poor outcomes, including increased risk of child maltreatment. Youth “aging out” of the foster care system may be at greater risk of maltreating their children due to their experiences of child maltreatment, a lack of social support, and little preparation for parenthood. This article examines current programs and policies targeting pregnant and parenting youth aging out and presents a research agenda that focuses on pregnancy prevention and positive parenting.     

Forensic determination of hair deposition time in crime scenes using electron paramagnetic resonance

Several types of biological samples, including hair strands, are found at crime scenes. Apart from the identification of the value and the contributor of the probative evidence, it is important to prove that the time of shedding of hair belonging to a suspect or victim matches the crime window. To this end, to estimate the ex vivo aging of hair, we evaluated time‐dependent changes in melanin‐derived free radicals in blond, brown, and black hairs by using electron paramagnetic resonance spectroscopy (EPR). Hair strands aged under controlled conditions (humidity 40%, temperature 20–22°C, indirect light, with 12/12 hour of light/darkness cycles) showed a time‐dependent decay of melanin‐derived radicals. The half‐life of eumelanin‐derived radicals in hair under our experimental settings was estimated at 22 ± 2 days whereas that of pheomelanin was about 2 days suggesting better stabilization of unpaired electrons by eumelanin. Taken together, this study provides a reference for future forensic studies on determination of degradation of shed hair in a crime scene by following eumelanin radicals by utilizing the non‐invasive, non‐destructive, and highly specific EPR technique.     

EMPLOYMENT AID FOR YOUTH AGING OUT OF FOSTER CARE: EXTENDING ONE-STOP CAREER CENTERS TO INCLUDE A DIVISION FOR FOSTER CARE YOUTH

Every year thousands of children are discharged from the foster care system and find themselves ill prepared for the responsibility of adulthood. Providing enhanced employment opportunities to both current and former foster care youth will allow them to become economically self-sufficient and therefore have an improved transition from foster care. This Note proposes that states incorporate a foster youth employment program in the one-stop career centers mandated by the Workforce Investment Act. Through this program, foster youth will be provided with the tools they need for success while maintaining control over their own future.     

Identification and dating of the fountain pen ink entries on documents by ion-pairing high-performance liquid chromatography

A novel approach for the identification and dating of the fountain pen ink entries on paper has been established by ion-pairing high-performance liquid chromatography (IP-HPLC). Twelve black and six red fountain inks have been collected, and their ink entries have been prepared by drawing lines on paper. The chromatographic conditions for separation of their dye components after extraction with solvents were optimized. Under the optimized conditions, the 18 fountain pen inks were differentiated individually by comparing the number of detectable main or minor dye components, and the relative peak intensities of each component. The ink entries were artificially and naturally aged, and the analysis results showed that the ink dye components were significantly decomposed when exposed to UV or fluorescent light compare to those of inks stored under natural condition. The changes of the relative peak height for the dye components were linearly related to the aging time, especially under natural aging conditions. The degradation characteristics of the dye components under different aging conditions provide scientific evidences for dating of the suspicious fountain pen ink entries on document.     

桂林市社会化居家养老模式的探索与思考

近几年，老龄化步伐的快速迈进对原有养老模式提出了严峻的挑战，人口老龄化的严峻形势需要社会化养老服务。桂林市积极探索新形势下社会化养老模式，推行的社会化“居家养老”模式走在广西区前列。进一步搭建服务平台、加强政策支撑；加大资金投入、提高使用效益；借鉴典型经验、创新发展思路；创新激励机制、壮大服务队伍以及建立评估制度、不断总结提升，应是推动社会化居家养老事业发展的有力举措。     

Kinematics of Signature Writing in Healthy Aging

Forensic document examiners (FDE) called upon to distinguish a genuine from a forged signature of an elderly person are often required to consider the question of age‐related deterioration and whether the available exemplars reliably capture the natural effects of aging of the original writer. An understanding of the statistical relationship between advanced age and handwriting movements can reduce the uncertainty that may exist in an examiner's approach to questioned signatures formed by elderly writers. The primary purpose of this study was to systematically examine age‐related changes in signature kinematics in healthy writers. Forty‐two healthy subjects between the ages of 60–91 years participated in this study. Signatures were recorded using a digitizing tablet, and commercial software was used to examine the temporal and spatial stroke kinematics and pen pressure. Results indicated that vertical stroke duration and dysfluency increased with age, whereas vertical stroke amplitude and velocity decreased with age. Pen pressure decreased with age. We found that a linear model characterized the best‐fit relationship between advanced age and handwriting movement parameters for signature formation. Male writers exhibited stronger age effects than female writers, especially for pen pressure and stroke dysfluency. The present study contributes to an understanding of how advanced age alters signature formation in otherwise healthy adults.     

人口老龄化对日本制造业出口比较研究--兼论对中国的启示

人口老龄化会通过影响劳动力供给、劳动力年龄分布和劳动效率对制造业出口比较优势产生影响。文章在对日本人口老龄化和出口比较优势现状分析的基础上，通过建立误差修正模型对二者关系进行了实证检验。发现虽然日本制造业在国际市场上具有较强的出口比较优势，但随着人口老龄化程度加剧，出口比较优势呈现下降趋势，这一结果对于不同的出口比较优势指标来说都是稳健的。文章为分析中国人口结构变动的影响提供了借鉴和启示。     

论农村养老保障体系的建立

农村养老保障体系的建立，是完善我国社会保障制度的要求，面临人口老龄化特别是农村人口的老龄化，如何逐步建立以政府为主导、家庭养老为辅助、其他多种形式并存、适应农村实际状况的养老保障体系，成为建设社会主义新农村过程中的一个重要问题。