グリッド間の電力融通を考慮したレジリエントな電力網分割

Open House, ISM in Tachikawa, 2015.6.19統計数理研究所オープンハウス（立川）、H27.6.19ポスター発

Core Challenge 2023: Solver and Graph Descriptions

This paper collects all descriptions of solvers and ISR instances submitted to CoRe Challenge 2023.Comment: arXiv admin note: text overlap with arXiv:2208.02495, arXiv:2207.1395

Proteus: A Hierarchical Portfolio of Solvers and Transformations

In recent years, portfolio approaches to solving SAT problems and CSPs have become increasingly common. There are also a number of different encodings for representing CSPs as SAT instances. In this paper, we leverage advances in both SAT and CSP solving to present a novel hierarchical portfolio-based approach to CSP solving, which we call Proteus, that does not rely purely on CSP solvers. Instead, it may decide that it is best to encode a CSP problem instance into SAT, selecting an appropriate encoding and a corresponding SAT solver. Our experimental evaluation used an instance of Proteus that involved four CSP solvers, three SAT encodings, and six SAT solvers, evaluated on the most challenging problem instances from the CSP solver competitions, involving global and intensional constraints. We show that significant performance improvements can be achieved by Proteus obtained by exploiting alternative view-points and solvers for combinatorial problem-solving.Comment: 11th International Conference on Integration of AI and OR Techniques in Constraint Programming for Combinatorial Optimization Problems. The final publication is available at link.springer.co

Electrotransfer of Different Control Plasmids Elicits Different Antitumor Effectiveness in B16.F10 Melanoma

Several studies have shown that different control plasmids may cause antitumor action in different murine tumor models after gene electrotransfer (GET). Due to the differences in GET protocols, plasmid vectors, and experimental models, the observed antitumor effects were incomparable. Therefore, the current study was conducted comparing antitumor effectiveness of three different control plasmids using the same GET parameters. We followed cytotoxicity in vitro and the antitumor effect in vivo after GET of control plasmids pControl, pENTR/U6 scr and pVAX1 in B16.F10 murine melanoma cells and tumors. Types of cell death and upregulation of selected cytosolic DNA sensors and cytokines were determined. GET of all three plasmids caused significant growth delay in melanoma tumors; nevertheless, the effect of pVAX1 was significantly greater than pControl. While DNA sensors in vivo were not upregulated significantly, cytokines IFN beta and TNF α were upregulated after GET of pVAX1. In vitro, the mRNAs of some cytosolic DNA sensors were overexpressed after GET; however, with no significant difference among the three plasmids. In summary, although differences in antitumor effects were observed among control plasmids in vivo, no differences in cellular responses to plasmid GET were detected in tumor cells in vitro. Thus, the tumor microenvironment as well as some plasmid properties are most probably responsible for the antitumor effectiveness

Observation of micropores in hard-carbon using Xe-129 NMR porosimetry

The existence of micropores and the change of surface structure in pitch-based hard-carbon in xenon atmosphere were demonstrated using Xe-129 NMR. For high-pressure (4.0 MPa) Xe-129 NMR measurements, the hard-carbon samples in Xe gas showed three peaks at 27, 34 and 210 ppm. The last was attributed to the xenon in micropores (<1 nm) in hard-carbon particles. The NMR spectrum of a sample evacuated at 773 K and exposed to 0.1 MPa Xe gas at 773 K for 24 h showed two peaks at 29 and 128 ppm, which were attributed, respectively, to the xenon atoms adsorbed in the large pores (probably mesopores) and micropores of hard-carbon. With increasing annealing time in Xe gas at 773 K, both peaks shifted and merged into one peak at 50 ppm. The diffusion of adsorbed xenon atoms is very slow, probably because the transfer of molecules or atoms among micropores in hard-carbon does not occur readily. Many micropores are isolated from the outer surface. For that reason, xenon atoms are thought to be adsorbed only by micropores near the surface, which are easily accessible from the surrounding space.</p

Emotional Intelligence and leadership behavior in Croatia, Bosnia & Herzegovina and Montenegro Hospitality supervisors

The purpose of this study is to explore emotional intelligence in relation to the hospitality sector in the West Balkans and how often it is used in a working environment. The key factors mentioned are of high importance for leading a successful team especially in the hospitality sector. The study consists of several key factors: employee-supervisor relationship satisfaction, supervisors' investment in bettering the team, supervisors' behavior under stress, understanding, respect and trust between the employee and the supervisor and many more. The topic is of high importance since there is a significant prejudice when it comes to leaders on the West Balkan and their comprehension of importance of emotional intelligence. This research is based on information gathered from people working in hotels in the Balkans in 2022

Emotional Intelligence and leadership behavior in Croatia, Bosnia & Herzegovina and Montenegro Hospitality supervisors

The purpose of this study is to explore emotional intelligence in relation to the hospitality sector in the West Balkans and how often it is used in a working environment. The key factors mentioned are of high importance for leading a successful team especially in the hospitality sector. The study consists of several key factors: employee-supervisor relationship satisfaction, supervisors' investment in bettering the team, supervisors' behavior under stress, understanding, respect and trust between the employee and the supervisor and many more. The topic is of high importance since there is a significant prejudice when it comes to leaders on the West Balkan and their comprehension of importance of emotional intelligence. This research is based on information gathered from people working in hotels in the Balkans in 2022

Multinational corporations’ oil exploration, poverty and environmental degradation in the Niger Delta region of Nigeria

In recent years, there has been much discussion and attention on the amount of poverty and environmental damage in Nigeria’s Niger Delta area as a result of oil drilling by international oil firms. There is little doubt that the actions of international oil firms have caused significant harm to this region’s oil producing areas. The ecological damage caused by oil exploration has rendered farming and fishing, which are the primary professions of this region’s rural population, obsolete.&nbsp; Several years of oil exploration by major international oil firms, as well as the risks of spills and gas flaring that accompany it, have destroyed the region’s ecosystem and left the town barren. As a result, this research investigates the effects of oil exploration on the inhabitants of the Niger Delta region. It also investigates the region’s level of environmental deterioration and deplorable poverty. The study will also address the interconnectivity dynamics that exist between environmental degradation and poverty in Nigeria’s Niger Delta area. In other words, the research investigates the extent to which oil exploration and environmental degradation are responsible for abject poverty and underdevelopment in Nigeria’s Niger Delta area