1,690 research outputs found
The minimal B-L model naturally realized at TeV scale
In a previous paper, we have proposed the minimal B-L extended standard model
as a phenomenologically viable model that realizes the Coleman-Weinberg-type
breaking of the electroweak symmetry. Assuming the classical conformal
invariance and stability up to the Planck scale, we will show in this paper
that the model naturally predicts TeV scale B-L breaking as well as a light
standard-model singlet Higgs boson and light right-handed neutrinos around the
same energy scale. We also study phenomenology and detectability of the model
at the Large Hadron Collider (LHC) and the International Linear Collider (ILC).Comment: 24pages, 8figure
大うつ病の診断および治療におけるSLC6A4遺伝子のメチル化解析の有用性
広島大学(Hiroshima University)博士(医学)Doctor of Philosophy in Medical Sciencedoctora
Effects of formulation and processing parameters on sodium availability in a model lipoproteic emulsion gel
Sodium reduction in processed foods is a high priority in the food industry due to the health implications of excessive dietary sodium consumption. Foods with a lipid/protein-based (lipoproteic) emulsion structure (such as processed cheeses and meats) are of particular interest because of their contribution to dietary sodium and the role of sodium in desired sensory and textural properties. When reducing sodium content in these food systems, it is crucial to understand the physicochemical and matrix properties contributing to sodium availability and saltiness perception.
The overall objective of this study was to characterize chemical and rheological influences on sodium availability in a model lipoproteic emulsion gel. There were three specific aims to accomplish the overall objective. The first aim was to characterize the effects of formulation and processing parameters on sodium ion molecular mobility and binding in the model gel system. The second aim was to characterize how altering formulation and processing parameters affected rheological and structural properties. The third aim was to correlate the measured mobility and rheological properties with sensory perceived saltiness and texture attributes.
To accomplish these objectives, model lipoproteic gels formulated with varying protein, fat, and NaCl content and processed with varying homogenization pressure were prepared. Sodium ion molecular activity was characterized with 23Na nuclear magnetic resonance (NMR) spectroscopy. Single quantum (SQ) experiments were used to characterize the mobility of overall sodium in the system, while double quantum filtered (DQF) experiments were used to characterize sodium in a restricted mobility ('bound') state and quantify relative 'bound' sodium. Formulation and processing parameters were found to influence gel structure and sodium matrix-interactions. Increasing protein or fat content reduced sodium mobility, and increasing protein or fat content or homogenization pressure increased the amount of relative 'bound' sodium. Rheological and structural properties were characterized with small deformation oscillatory rheometry and creep compliance/recovery rheometry. Gel mechanical behavior was successfully modeled with a four-component Burgers model, and it was found that increasing protein, fat, or salt content or homogenization pressure resulted in a stronger and more solid protein network structure. The results from the 23Na NMR and rheometry experiments were correlated with sensory taste and texture properties obtained by quantitative descriptive analysis (QDA). Salty taste and syneresis texture correlated positively with sodium mobility and elastic compliance, and correlated negatively with dry matter content, relative 'bound' sodium, and gel firmness.
This study found that formulation and homogenization pressure significantly influence sodium behavior and rheology in lipoproteic emulsion gels, which may have significant implications for saltiness perception and sodium reduction. The results suggest that saltiness perception can be influenced by altering sodium availability via modulation of molecular interactions, texture, and sodium release. Future research could explore increasing saltiness perception by introducing species that compete with sodium for binding sites to increase sodium availability
Resonant Leptogenesis in the Minimal B-L Extended Standard Model at TeV
We investigate the resonant leptogenesis scenario in the minimal B-L extended
standard model(SM) with the B-L symmetry breaking at the TeV scale. Through
detailed analysis of the Boltzmann equations, we show how much the resultant
baryon asymmetry via leptogenesis is enhanced or suppressed, depending on the
model parameters, in particular, the neutrino Dirac Yukawa couplings and the
TeV-scale Majorana masses of heavy degenerate neutrinos. In order to consider a
realistic case, we impose a simple ansatz for the model parameters and analyze
the neutrino oscillation parameters and the baryon asymmetry via leptogenesis
as a function of only a single CP-phase. We find that for a fixed CP-phase all
neutrino oscillation data and the observed baryon asymmetry of the present
universe can be simultaneously reproduced.Comment: 25 pages, 15 figures, version to be published in Phys. Rev.
A study for 2-D indoor localization using multiple leaky coaxial cables
Indoor localization technology, which can provide the location information of the target object or stochastic things, is becoming essential requirement for many applications and services such as Internet-of-Things (IoT), real-time control in the development of Fifth-generation (5G) technology. Leaky coaxial cable which can be used as antennas is able to detect the location of the user in a simple way due to its potential property. In this paper, we proposes a simple method to improve the localization accuracy of 2-D indoor localization using multiple LCX cables. In addition, we also evaluate the channel capacity loss due to the localization error of the LCX-MIMO using our proposed method
Autonomous Navigation, Guidance and Control of Small Electric Helicopter
In this study, we design an autonomous navigation, guidance and control system for a small electric helicopter. Only small, light-weight, and inaccurate sensors can be used for the control of small helicopters because of the payload limitation. To overcome the problem of inaccurate sensors, a composite navigation system is designed. The designed navigation system enables us to precisely obtain the position and velocity of the helicopter. A guidance and control system is designed for stabilizing the helicopter at an arbitrary point in three-dimensional space. In particular, a novel and simple guidance system is designed using the combination of optimal control theory and quaternion kinematics. The designs of the study are validated experimentally, and the experimental results verify the efficiency of our navigation, guidance and control system for a small electric helicopter.ArticleINTERNATIONAL JOURNAL OF ADVANCED ROBOTIC SYSTEMS. 10:54 (2013)journal articl
Screen-Based Analysis of Magnetic Nanoparticle Libraries Formed Using Peptidic Iron Oxide Ligands
The identification of effective polypeptide ligands for magnetic iron oxide nanoparticles (IONPs) could considerably accelerate the high-throughput analysis of IONP-based reagents for imaging and cell labeling. We developed a procedure for screening IONP ligands and applied it to compare candidate peptides that incorporated carboxylic acid side chains, catechols, and sequences derived from phage display selection. We found that only l-3,4-dihydroxyphenylalanine (DOPA)-containing peptides were sufficient to maintain particles in solution. We used a DOPA-containing sequence motif as the starting point for generation of a further library of over 30 peptides, each of which was complexed with IONPs and evaluated for colloidal stability and magnetic resonance imaging (MRI) contrast properties. Optimal properties were conferred by sequences within a narrow range of biophysical parameters, suggesting that these sequences could serve as generalizable anchors for formation of polypeptide–IONP complexes. Differences in the amino acid sequence affected T[subscript 1]- and T[subscript 2]-weighted MRI contrast without substantially altering particle size, indicating that the microstructure of peptide-based IONP coatings exerts a substantial influence and could be manipulated to tune properties of targeted or responsive contrast agents. A representative peptide–IONP complex displayed stability in biological buffer and induced persistent MRI contrast in mice, indicating suitability of these species for in vivo molecular imaging applications.National Institutes of Health (U.S.) (Grant R01-DA28299)National Institutes of Health (U.S.) (Grant R01-NS76462)National Institutes of Health (U.S.) (Grant R21-MH102470)Japan Society for the Promotion of Science (Postdoctoral Fellowship for Research Abroad
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