The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Coherent control of Rb2 predissociation by chirped femtosecond laser pulses is detected by a wavepacket probe. Specific atomic fragments of molecular dissociation are identified by viewing the wavepacket dynamics in the spectral domain.
Coherent control of Rb2 predissociation by chirped femtosecond laser pulses is detected by a wavepacket probe. Specific atomic fragments of molecular dissociation are identified by viewing the wavepacket dynamics in the spectral domain.
This paper presents the design and simulation of a CMOS Ultra-wideband Low noise Amplifier. In the design, specific architecture decisions were made in consideration of system-on-chip implementation. The basic architecture of the LNA designed herein exhibits a differential amplifier core with active input and output impedance matching. Simulations reveal that the LNA maintains a gain of 16.7 dB with...
High-resolution MALDI-TOF (matrix-assisted laser desorption/ionization time-of-flight) mass spectrometry has shown promise as a screening tool for detecting discriminatory protein patterns. The major computational obstacle in analyzing MALDI-TOF data is a large number of mass/charge peaks (a.k.a. features, data points). With the number of data points easily going beyond one million for a single sample,...
In this paper, we present a new hybrid approach for unsupervised gene selection. Hybrid approaches try to utilize different evaluation criteria of the filter approaches and wrapper approaches in different search stages. Our method thus uses a two-step approach to identify informative genes. The first step retrieves gene subsets with original physical meaning based on their capacities to reproduce...
In component-based software engineering, software systems are mainly constructed based on reusable components, such as third-party components and in-house built components. Hence, system quality depends on the quality of the involved components. Any change of a component, it must be re-tested at the unit level, and re-integrated to form component-based application systems. Although a number of recently...
Service-oriented architecture (SOA) is a system architecture in which a collection of loosely coupled services communicate with each other using standard interfaces and message-exchanging protocols. As an emerging technology in software development, the SOA presents a new paradigm, and it affects the entire software development cycle including analysis, specification, design, implementation, verification,...
In recent years, unsupervised gene (feature) selection has become an integral part of microarray analysis because of the large number of genes and complexity in biological systems. Principal components analysis (PCA) is one of the approaches which has been applied, even though principal components (PCs) have no clear physical meanings. In this paper, we present a PCA based feature selection within...
Perforator flaps have been widely used in plastic surgery for greater survivability and decreased morbidity. However, quantitative analysis of three dimensional (3D) blood flow direction and location has not been examined yet. In this paper, we reconstruct the 3D vascular tree with the incorporation of temporal information (4D) from contrast-agent propagation. A novel computational framework by adopting...
Understanding the motility of subcellular particles like organelles, vesicles, or mRNAs is critical to understand how cells regulate delivery of specific proteins from the site of synthesis to the site of action. The goal of this paper is to present a framework of feature selection, matching, and evaluation for the segmentation and tracking of green fluorescent protein (GFP) labeled subcellular structures...
Coherent control of predissociation of the Rb dimer in 8times10-3 Torr of Rb vapor is achieved with chirped femtosecond laser pulses. The preferred dissociation channels for different values of pulse chirp are found experimentally.
NASA is planning manned exploration missions back to the Moon and on to Mars. Space-based applications, which are required to be energy efficient for these missions - may have to operate in environments with intermittent connectivity, long latencies, and possibly with relay nodes. This paper overviews protocol stacks from IEEE, IETF, and CCSDS appropriate for these missions
We present advanced technology developments in space networking achieved under the Interplanetary Network Directorate Information Technology Program. Progress has been made in three primary areas: (1) distributed on-board scheduling as it applies to communications; (2) middleware services; and (3) communications protocols. Demonstrations of these capabilities have been provided using a simulation...
On-going development of Ka-band capability for the deep space networks (DSN) will radically increase the bandwidth available to support advanced mission concepts envisioned for future robotic as well as human exploration of Mars and beyond. While Ka-band links can operate at much higher data rate than X-band, they are much more susceptible to fluctuating weather conditions and manifest a significant...
Tagging and tracking protein molecules with the help of laser scanning confocal microscope (LSCM) is a key to better understanding of proteomics in diverse aspects. One challenge of tracking multiple green fluorescent protein (GFP) clusters is how to deal with the interaction between multiple objects, namely splitting and merging. In this paper, we propose a framework to track multiple GFP clusters...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.