Economic Analysis of SONET/WDM UPSR and BLSR Ring Networks Using Traffic Grooming

We consider the traffic grooming problem for the design of SONET/WDM(Synchronous Optical NETwork/ Wavelength Division Multiplexing) ring networks. Given a physical network with ring topology and a set of traffic demands between pairs of nodes, we are to obtain a stack of rings with the objective of minimizing the number of ADMs installed at the nodes. This problem arises when a single ring capacity is not large enough to accommodate all the demands. As a solution method, an efficient algorithm based on the branch-and-price approach has been reported in the literature for the problem in which only unidirecional path switched ring (UPSR) was considered. In this study, we suggest integer programming models and the algorithms based on the same approach as the above one, considering two-fiber bidirectional line switched ring(BLSR/2), and BLSR/4 additionally. Using the results, we compare the number of required ADMs for all types of the ring architecture

Fungal Secretome Database: Integrated platform for annotation of fungal secretomes

<p>Abstract</p> <p>Background</p> <p>Fungi secrete various proteins that have diverse functions. Prediction of secretory proteins using only one program is unsatisfactory. To enhance prediction accuracy, we constructed Fungal Secretome Database (FSD).</p> <p>Description</p> <p>A three-layer hierarchical identification rule based on nine prediction programs was used to identify putative secretory proteins in 158 fungal/oomycete genomes (208,883 proteins, 15.21% of the total proteome). The presence of putative effectors containing known host targeting signals such as RXLX [EDQ] and RXLR was investigated, presenting the degree of bias along with the species. The FSD's user-friendly interface provides summaries of prediction results and diverse web-based analysis functions through Favorite, a personalized repository.</p> <p>Conclusions</p> <p>The FSD can serve as an integrated platform supporting researches on secretory proteins in the fungal kingdom. All data and functions described in this study can be accessed on the FSD web site at <url>http://fsd.snu.ac.kr/</url>.</p

IMGD: an integrated platform supporting comparative genomics and phylogenetics of insect mitochondrial genomes

<p>Abstract</p> <p>Background</p> <p>Sequences and organization of the mitochondrial genome have been used as markers to investigate evolutionary history and relationships in many taxonomic groups. The rapidly increasing mitochondrial genome sequences from diverse insects provide ample opportunities to explore various global evolutionary questions in the superclass Hexapoda. To adequately support such questions, it is imperative to establish an informatics platform that facilitates the retrieval and utilization of available mitochondrial genome sequence data.</p> <p>Results</p> <p>The Insect Mitochondrial Genome Database (IMGD) is a new integrated platform that archives the mitochondrial genome sequences from 25,747 hexapod species, including 112 completely sequenced and 20 nearly completed genomes and 113,985 partially sequenced mitochondrial genomes. The Species-driven User Interface (SUI) of IMGD supports data retrieval and diverse analyses at multi-taxon levels. The Phyloviewer implemented in IMGD provides three methods for drawing phylogenetic trees and displays the resulting trees on the web. The SNP database incorporated to IMGD presents the distribution of SNPs and INDELs in the mitochondrial genomes of multiple isolates within eight species. A newly developed comparative SNU Genome Browser supports the graphical presentation and interactive interface for the identified SNPs/INDELs.</p> <p>Conclusion</p> <p>The IMGD provides a solid foundation for the comparative mitochondrial genomics and phylogenetics of insects. All data and functions described here are available at the web site <url>http://www.imgd.org/</url>.</p

Broken Kramers' degeneracy in altermagnetic MnTe

Altermagnetism is a newly identified fundamental class of magnetism with vanishing net magnetization and time-reversal symmetry broken electronic structure. Probing the unusual electronic structure with nonrelativistic spin splitting would be a direct experimental verification of altermagnetic phase. By combining high-quality film growth and $in~situ$ angle-resolved photoemission spectroscopy, we report the electronic structure of an altermagnetic candidate, $\alpha$-MnTe. Temperature dependent study reveals the lifting of Kramers{\textquoteright} degeneracy accompanied by a magnetic phase transition at $T_N=267\text{ K}$ with spin splitting of up to $370\text{ meV}$, providing direct spectroscopic evidence for altermagnetism in MnTe

Spontaneous breaking of mirror symmetry beyond critical doping in Pb-Bi2212

Identifying ordered phases and their underlying symmetries is the first and most important step toward understanding the mechanism of high-temperature superconductivity; critical behaviors of ordered phases are expected to be correlated with superconductivity. Efforts to find such ordered phases have been focused on symmetry breaking in the pseudogap region while the Fermi liquid-like metal region beyond the so-called critical doping $p_{c}$ has been regarded as a trivial disordered state. Here, we used rotational anisotropy second harmonic generation and uncovered a broken mirror symmetry in the Fermi liquid-like phase in (Bi,Pb)$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$ with $p = 0.205 > p_{c}$. By tracking the temperature evolution of the symmetry-breaking response, we verify an order parameter-like behavior with the onset temperature $T_{up}$ at which the strange metal to Fermi liquid-like-metal crossover takes place. Complementary angle-resolved photoemission study showed that the quasiparticle coherence between $\mathrm{CuO_{2}}$ bilayers is enhanced in proportion to the symmetry-breaking response as a function of temperature, indicating that the change in metallicity and symmetry breaking are linked. These observations contradict the conventional quantum disordered scenario for over-critical-doped cuprates and provide new insight into the nature of the quantum critical point in cuprates.Comment: 8 pages, 4 figure

Manipulator Collision Avoidance System Based on a 3D Potential Field with ISO 15066

Recently, various intelligent technological innovations are being applied to smart factories. As manipulators are widely used in smart factories, the manipulator and the workspace of humans overlap, and interest in cooperative robots and human safety has increased. In relation to this, a collision-avoidance control algorithm applicable in three dimensions (3D) and that also meets existing safety standards for humans and robots is required. In this paper, we propose a 3D potential field-based manipulator collision avoidance algorithm that meets the requirements of the ISO 15066 standard. This algorithm applies Speed and Separation Monitoring(SSM) according to the distance between the manipulator and the obstacle and controls the speed of the manipulator slowly as the risk is higher. This allows us to overcome the limitations that existing studies have not been conducted on 3D potential field-based obstacle avoidance and that it is difficult to apply to the field without considering ISO 15066. The proposed system was verified through simulation and experiments, and through comparison with the existing algorithm, we verified that SSM was well applied to the proposed system. AuthorTRU

The Role of Chronological Age, Health, and Basic Psychological Needs for Older Adults’ Travel Intention

This study examined how demographic information, chronological age, older adults&rsquo; physical and mental health, and basic psychological needs affected travel intention. The survey samples were collected from 577 adults, all over 60 years of age. A hierarchical multiple regression analysis was used to test the proposed hypotheses. First, demographic information with chronological age was used for primary analysis. The outcome indicated that chronological age was negatively associated with travel intention while all other demographic variables were not. Secondly, when physical and mental health condition variables were added, physical health positively affected travel intention while chronological age still negatively affected travel intention. Thirdly, psychological needs (autonomy, competence, relatedness) for travel were included in the final analysis. The outcome showed that all psychological needs variables had a significant impact on travel intention for those with a physical health condition. However, chronological age was not a significant factor in travel intention during this analysis. This study shows that chronological age is not always an important factor that affects older adults&rsquo; travel intention when other health and psychological variables are considered. This study provides some practical implications and tips for travel industry managers who are targeting the aging population

Design of local networks using USHRs

We consider the problem of designing a local network in a two-level telecommunication network. Given one or two hub nodes, central offices (COs) and conduits, the problem is to find a set of unidirectional self-healing rings (USHRs) which covers all COs and satisfies all demands at minimum cost. The solution approach used is the decomposition and column generation. Master problem and subproblem are modeled as integer programming models. After the optimal solution to linear programming relaxation of the master problem is obtained, a branch-and-bound algorithm is used to get an integer solution. A set of valid inequalities for a subproblem is given and a branch-and-cut algorithm is used to find an optimal solution to the subproblem. Computational results using real data are reported