Hot Trace Research Articles

A forrónyomos felderítés vezetése, irányítása megújításának lehetséges irányai

A tanulmányom elkészítésére azért vállalkoztam, mivel közel 20 éves szakmai tapasztalattal és háttérrel rendelkezem ezen a területen, illetve az eltelt évek alatt sok olyan módszert és eljárást vezettek be ezen a kriminalisztikai területen, amelyek nagyban hozzájárulhatnak a felderítés e speciális formájának továbbfejlesztéséhez és korszerűsítéséhez. A korszerű forrónyomos felderítés ismerete és alkalmazása rendkívül fontos a hatékony bűnüldözés során. A felderítés első 24 órája kulcsfontosságú az elkövető beazonosítása, felderítése és esetleges elfogása szempontjából. Tanulmányomban megvizsgáltam a témához kapcsolódó legfontosabb rendszertani fogalmakat: felderítés, forrónyomos felderítés, üldözés, nyomon üldözés, nyomozás és körözés. A témával kapcsolatos jogi szabályozást és annak rendszerét is vizsgálat alá vontam, az egyes fontosabb vonatkozó hatályos jogszabályokat külön is részletesen áttekintettem. Végezetül a leírtak és személyes tapasztalataim alapján olyan javaslatokat fogalmaztam meg, amelyek a forrónyomos felderítést még hatékonyabbá és még inkább reagálókészebbé tehetik.

MTCrossBit: A dynamic binary translation system based on multithreaded optimization

Dynamic optimization has been proposed to overcome many limitations caused by static optimization and is widely applied in dynamic binary translation (DBT) to effectively enhance system performance. However, almost all the existing dynamic optimization techniques or methods employed in DBT systems for a single-threaded executive environment considerably increase the complexity of the hardware or the striking runtime overhead. We propose a multithreaded DBT framework with no associated hardware called the MTCrossBit, where a helper thread for building a hot trace is employed to significantly reduce the overhead. In addition, the main thread and helper thread are each assigned to different cores to use the multi-core resources efficiently to attain better performance, two novel methods yet to be implemented in the MTCrossBit are presented: the dual-special-parallel translation caches and the new lock-free threads communication mechanism—assembly language communication (ASLC). We then apply quantitative analysis to prove that MTCrossBit can speed up the original CrossBit. Simultaneously, we present results from the implementation of the MTCrossBit on the uniprocessor machines with multi-cores utilizing the benchmark-SPECint 2000, and illustrate that we achieved some success with the above concurrent architecture.

FTIR Spectroscopy of the Atmosphere. I. Principles and Methods

In recent years Fourier transform infrared (FTIR) spectroscopy has been the dominant technique used for measuring the infrared (IR) absorption and emission spectra of most materials, with substantial advantages in signal‐to‐noise ratio, resolution, speed, and detection limits. The major advantage of the FTIR technique over other spectroscopic methods is that practically all compounds show characteristic absorption/emission in the IR spectral region and based on this property they can thus be analyzed both quantitatively and qualitatively. The quest for highly sensitive detection methods for atmospheric trace gas samples, either in laboratory setup or in outdoor remote sensing, has been on agenda for several decades. The fast and intensive development of FTIR spectroscopic techniques has propelled the progress of trace gas analysis of the atmosphere. Since the early 1970s the number and scope of FTIR atmospheric measurements has increased steadily. In this review article we are making an attempt to summarize the results of the most significant contributions to the field of FTIR spectroscopy to trace gas analysis of the atmosphere. Beside the basic description of the extractive and open‐path measurement methods, the difficulties connected with collection of appropriate background reference spectra, the ways of qualitative analysis and quantitative evaluation of measured spectra, the problems of calibration, and the effects of spectral resolution on detection sensitivity are discussed. The techniques reviewed include in situ IR absorption measurements over open paths in the field, such as remote sensing using the sun, the sky, or natural hot objects as IR sources of radiation, and also IR emission measurements of hot trace gas sources e.g., stack emissions, exhaust gases of combustion sources, and other industrial effluents.