Forensic Analysis of Digital Dynamic Signatures: New Methods for Data Treatment and Feature Evaluation

This study explored digital dynamic signatures containing quantifiable dynamic data. The change in data content and nature necessitates the development of new data treatment approaches. A SignPad Omega digitizing tablet was used to assess measurement reproducibility, as well as within‐writer variation and the occurrence of correctly simulated features. Measurement reproducibility was found to be high except for pressure information. Within‐writer variation was found to be higher between days than on a same day. Occurrence of correct simulation was low for features such as signature size, trajectory length, and total signature time. Feature discrimination factors combining within‐writer variability and the occurrence of correctly simulated features were computed and show that signature size, trajectory length, and signature time are the features that perform the best for discriminating genuine from simulated signatures. A final experiment indicates that dynamic information can be used to create connections between simulation cases.     

陕甘宁边区的民事立法及其对当代民法典编纂的启示

发轫于战争特殊时代的陕甘宁边区民事法律,是边区法律制度的重要组成部分。民国六法全书、中共的政策、边区民事立法、民事习惯构成了边区民事法律的主要渊源。中共领导了边区民事立法,体现出民主立法、与时更进、因地制宜等特征,深入分析边区民事立法的基本经验,有助于推动当代中国民法典的编纂。     

美国怀俄明州刑法述评--以比较法为视角

美国的法律在试图向法典化迈进的征途中被深深地打上了其固有的英美法系传统的烙印,怀俄明州刑法一方面向法典化迈出一大步,另一方面也深深地烙上了美国实用主义文化的烙印.本文概述了该州刑法的主要内容,从比较法的角度上指出迈向法典化中的问题;同时指出法律规范是民族文化的积淀,两大法系的立法模式及其运作孰优孰劣,有待于法律运行的实效去检验,移植一项法律制度更为重要的是培育该制度赖以生根发芽的文化土壤.     

译码器原理及其应用

译码器可以用来实现组合电路,也可以用来实现码制转换。本文系统说明了译码的原理及应用方法。用Verilog HDL来设计一个带使能端的3线-8线译码器,并用3线-8线译码器来实现5421译码器。     

The dynamic character of disguise behavior for text-based, mixed, and stylized signatures

The aims of this study were to determine if dynamic parameters (duration, size, velocity, jerk, and pen pressure) differed for signing style (text-based, stylized, and mixed) and if signing style influences handwriting dynamics equally across three signature conditions (genuine, disguised, and auto-simulation). Ninety writers provided 10 genuine signatures, five disguised signatures, and five auto-simulated signatures. All 1800 signatures were collected using a digitizing tablet resulting in a database of each signature's dynamic characteristics. With genuine signatures, there were significant differences between styles for size, velocity, and pen pressure, and there were significant differences between genuine signatures and at least one of the un-natural signature conditions for all parameters. For velocity and size, these changes with condition were dependent on style. Changes with condition for the other parameters were similar for the three styles. This study shows that there are differences among natural signature styles and disguise behaviors that may be relevant in forensic signature examinations.     

The influence of gender on ability to simulate handwritten signatures: a study of Arabic writers

This study investigates whether a writer's gender can be determined from an inspection of simulated signatures written in the Arabic alphabet or Arabic abjad. It is generally believed that the penmanship of female writers is superior to male writers. There is also reason to expect that superiority in writing skill might contribute to success in simulating the signatures of other writers. Simulated signatures produced by a large population of male (414) and female (312) Arabic writers were graded, and the results were statistically analyzed. Women were found to have a marginal advantage simulating all elements of the signatures, but there was no statistically significant difference between the genders on any of the elements examined.     

Uniformity as response to soft law: Evidence from compliance and non‐compliance with the Dutch corporate governance code

The objective of the paper is to examine how firms have dealt with the trade‐off between flexibility and uncertainty that is characteristic for the decision‐making of firms in coping with self‐regulatory initiatives in general and the comply‐or‐explain principle in corporate governance in particular. Using unique data for 126 listed Dutch firms, we find that firms respond to this self‐regulatory initiative by largely complying with the code recommendation, possibly out of fear that the firm's reputation may be damaged. Furthermore, we find evidence suggesting that firms confine themselves to adopting a specific set of code recommendations and use similar arguments to explain non‐compliance. Our findings indicate uniformity in adopting the standard of good governance which is not in line with the logic of corporate governance codes and casts doubt on the effectiveness of this form of soft law. Overall, the paper's findings indicate that more restrictive (regulatory) instruments may be necessary to make firms conform to the spirit of codes.     

The inadequate legislative response to e-signatures

This article examines the two most influential international initiatives on electronic signatures (UNCITRAL’s 1996 Model Law on Electronic Commerce and the 1999 EU Electronic Signature Directive). It considers whether the legislative approaches in Australia and the United Kingdom based on these initiatives are helpful in deciding whether lower level signature methods such as simple email messages are likely to satisfy a legal requirement for a signature. The conclusion reached is that they are unhelpful. The article goes on to consider whether legislative amendments based on UNCITRAL’s 2001 Model Law on Electronic Signatures or the 2005 UN Convention on the Use of Electronic Communications in International Contracts would improve the identified weaknesses. It concludes that such an update would clarify some issues, but that overall it will not solve the difficulties. The article ends with a brief speculation on the likely attributes of a more helpful approach.     

Progressing with the reform and opening up: Retrospective of China’s civil law (1978–2008)

Over the past 30 years, Chinese civil and commercial law has made great achievements in providing theoretical support for Chinese legislation, establishing a theoretical system of civil and commercial law with Chinese characteristics, conducting in-depth and comparative research in this field, and making many summaries of trial practices, judicial interpretations and case studies of civil and commercial affairs. The academic circle has expressed professional comments regarding public events. The major theoretical breakthroughs include the clarification of the relationship between civil law and economic law, further research on the civil code system, basic consensus on the integration of civil law and commercial law, formation of the theoretical system of property right law with Chinese characteristics, innovation and development of contract law theories, basic information of personality law theories, and formation of the theoretical system of tort law. The orientation of Chinese civil and commercial law is to enhance comparative research on civil and commercial law nationally and internationally, focusing on the diversity of research methodologies.     

A Prototype of Mathematical Treatment of Pen Pressure Data for Signature Verification

A prototype using simple mathematical treatment of the pen pressure data recorded by a digital pen movement recording device was derived. In this study, a total of 48 sets of signature and initial specimens were collected. Pearson's correlation coefficient was used to compare the data of the pen pressure patterns. From the 820 pair comparisons of the 48 sets of genuine signatures, a high degree of matching was found in which 95.4% (782 pairs) and 80% (656 pairs) had rPA > 0.7 and rPA > 0.8, respectively. In the comparison of the 23 forged signatures with their corresponding control signatures, 20 of them (89.2% of pairs) had rPA values < 0.6, showing a lower degree of matching when compared with the results of the genuine signatures. The prototype could be used as a complementary technique to improve the objectivity of signature examination and also has a good potential to be developed as a tool for automated signature identification.