Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Estimating the Number of Tanker Collisions in the Gulf of Finland in 2015

Hanninen P., Kujala P., Ylitalo J., Kuronen J.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2012

Vol. 6, no. 3

367--373

The paper presents a model for estimating the number of ship-ship collisions for future traffic scenarios. The modeling is based on an approach where the number of collisions in an area is estimated as a product of the number collision candidates, i.e. the number of collisions of two ships, if no evasive maneuvers were made, and a causation probability describing the probability of making no evasive maneuvers. However, the number of collisions is presented as a combination of binomially distributed random variables. The model is applied for the assessment of tanker collision frequency in the Gulf of Finland in 2015. 2015 traffic is modeled as three alternative scenarios each having a certain probability of occurrence. The number of collisions can be presented either for each scenario, or as an estimate including the uncertainty in future marine traffic development by taking into account all scenarios and their occurrence probabilities.

Low cost lasers challenge ultrafast systems in two-photon excitation applications

Tirri M., Vaarno J., Soini J., Hanninen P.

Opto-Electronics Review

2003

Vol. 11, No. 1

39-44

Although excellent research tools, the ultrafast laser systems are poorly suited for routine laboratory instrumentation, simply due to their high price. Our research group has shown tat application of two-photon excitation need not to be limited to those laboratories that can afford the price and maintenance of ultrafast laser systems. With certain compromises and well-designed experiments, low-cost lasers can be used in utilizing the positive properties of two-photon excitation. The purpose of this publication is to show examples of bioanalytical applications that are possible using low-cost lasers. A bioaffinity assay using microparticles as bioactive carriers and assay for characterization of cell surface antigens are presented. By direct comparison of the example assays in two instrumental set-ups, a quantity is given to the 'compromises' that are made by replacing an ultrafast system with low cost equipment.