Improvement in Latent Fingerprint Detection on Thermal Paper Using a One‐Step Ninhydrin Treatment with Polyvinylpyrrolidones (PVP)

Abstract: Most thermosensitive surfaces of thermal paper turn black when they come into contact with polar organic solvents such as are used in ninhydrin petroleum benzin solution. This dark staining reduces the contrast between the developed fingerprint and the background to such an extent that the identification process becomes very difficult. Integrating polyvinylpyrrolidones (PVP) into a ninhydrin solution prevents the black staining, and the developed fingerprints appear in clear contrast to the background. The new ninhydrin solution containing PVP is successful compared to the two‐step ninhydrin–acetone washing method for thermal paper which is popular in Germany.     

Die Selbstbehauptung und Selbstgefährdung des Friedens als Herrschaft des Rechts

Peace is conceivable only as a legal order. According to Hans Kelsen, a legal order is by its very nature a ‘coercive order’. Thus, peace and coercion are not mutually exclusive, but refer to each other in the concept of law. In this contribution, we elaborate and problematize the paradoxical relationship between coercion and peace in theoretical and historical perspective. For this, we differentiate between arbitrary force and legal enforcement in the context of world-order politics. While we argue in favor of peace through law enforcement, we also emphasize the element of arbitrariness in the concept and historical formation of law. This is to say that the stabilization of peace through legal coercion goes hand in hand with its simultaneous destabilization. The text unfolds this dilemma with reference to the evolution of the theory and practice of legitimizing the use of force from past to present. We argue that the dilemma cannot be overcome, but it can be mitigated through the creation of a rule of law, which allows for a reflexive treatment of the tension between peace and coercion.     

DVPW-Mitteilungen

Ohne Zusammenfassung     

Studies presented to the international commission for the history of representative and parliamentary institutions 1980 — 1985

SUMMARY

In this article Joseba Agirreazkuenaga continues his account of the development of the Basque political institutions to the period following the settlement of the first Carlist war by the Convention of Bergera in 1839. This laid down a process for incorporating the Basque foral institutions into the framework of the new liberal constitution of the Spanish monarchy. It required negotiations between the Spanish Cortes and Basque representatives, which produced the institution of the Basque Conferencias to speak for the three Basque provinces. Once established these developed into the main institutional voice for the developing Basque national movemebt. By the 1860s the Conferencias had virtually acquired the function of a Basque provincial government.     

Women students in the former GDR‐a research note

Drawing on longitudinal statistics on admissions, graduation, subject choices and studies in eastern European countries, the paper brings together further evidence about the unequal opportunities of women in higher education in the former GDR.     

Advanced solvent-free application of ninhydrin for detection of latent fingerprints on thermal paper and other surfaces

This work presents the first known experiments of ninhydrin sublimation in vacuum to detect latent fingerprints on thermal paper. In this method, latent fingerprints become visible in rich detail without the background black staining known from the application of ninhydrin solutions to thermal paper. The method involves hanging the thermal paper samples 15 cm above a heating source with dispersed ninhydrin crystals in a vacuum chamber. The optimized conditions for ninhydrin sublimation are 50 mg ninhydrin, 2 to 5 mbar vacuum, and 150 degrees C heating source temperature for 30 min. The application of this method is also successful on the new euro notes. Latent fingerprints can be developed across the transitions from paper to optical variable device (OVD).     

The Authoritative Interpretation Under Article IX:2 of the Agreement Establishing the World Trade Organization: Current Law, Practice and Possible Improvements

The Agreement Establishing the World Trade Organization reservesthe right to adopt ‘authoritative interpretations’of the multilateral trade agreements to the Ministerial Conferenceand the General Council. Given that, to date, this instrumenthas not been used, the present article intends to highlightits structural importance for the balance of powers within thelegal system of the World Trade Organization. It identifiesthe use that could and should be made of it and reviews thepractice so far. The article attempts to explain the reasonsfor the present lack of authoritative interpretations in theWorld Trade Organization and presents several options for thefuture. At the outset, this article explores the parametersthat are relevant for this discussion, notably the possiblescope and legal effects of an authoritative interpretation.Important questions are whether an authoritative interpretationis legally binding on all WTO Members, whether it may modifythe existing law or whether the rules of treaty interpretationare relevant in the formulation of an authoritative interpretation,and whether its validity can be challenged in dispute settlement.     

An Amino Acid Model for Latent Fingerprints on Porous Surfaces*

Abstract: Analytical standards are needed in latent fingerprint detection for research and development as well as for quality control in routine work because normal fingerprints are too varied for comparison studies and tests. One way is to create latent fingerprints. For the amino acid sensitive detection method this can be achieved by coating test items with an amino acid solution using a modified commercial office bubble jet printer. Besides low costs, fast and easy preparation, the main advantage of a bubble jet printer is that the amino acid loading per area on the test item can be calculated by weighing the cartridge on a balance. This opens the possibility to determine the deviation for every printing series. The reproducibility of prints in a printing series made by one cartridge has a deviation of 2–16% and of prints made by different cartridges 20–25%.