The Exact Potential Driving the Electron Dynamics in Enhanced Ionization

It was recently shown that the exact factorization of the electron-nuclear wavefunction allows the construction of a Schr\"odinger equation for the electronic system, in which the potential contains exactly the effect of coupling to the nuclear degrees of freedom and any external fields. Here we study the exact potential acting on the electron in charge-resonance enhanced ionization in a model one-dimensional H$_2^+$ molecule. We show there can be significant differences between the exact potential and that used in the traditional quasistatic analyses, arising from non-adiabatic coupling to the nuclear system, and that these are crucial to include for accurate simulations of time-resolved ionization dynamics and predictions of the ionization yield

A Novel Topology Optimization Approach for Flow Power Loss Minimization Across Fin Arrays

Fin arrays are widely utilized in many engineering applications, such as heat exchangers and micro-post reactors, for higher level of fluid–solid contacts. However, high fluid pressure loss is reportedly the major drawback of fin arrays and a challenge for pumping supply, particularly at micro-scales. Previous studies also indicate that fin shapes, spacing and alignment play an important role on the overall pressure losses. Therefore, we present a numerical tool to minimize pressure losses, considering the geometrical aspects related to fin arrays. In this regard, a density-based topology optimization approach is developed based on the pseudo-spectral scheme and Brinkman penalization in 2D periodic domains. Discrete sensitives are derived analytically and computed at relatively low cost using a factorization technique. We study different test cases to demonstrate the flexibility, robustness and accuracy of the present tool. In-line and staggered arrays are considered at various Reynolds numbers and fluid–solid volume fractions. The optimal topologies interestingly indicate a pressure loss reduction of nearly compared to circular fins. In passive optimization test examples, the added solid parts reduced pressure loss of a circular fin ( ) by eliminating the flow separation and filling the wake region

Extrinsic and intrinsic curvatures in thermodynamic geometry

We investigate the intrinsic and extrinsic curvatures of certain hypersurfaces in the thermodynamic geometry of a physical system and show that they contain useful thermodynamic information. For an anti-Reissner-Nordstr\"{o}m-(A)de Sitter black hole (Phantom), the extrinsic curvature of a constant $Q$ hypersurface has the same sign as the heat capacity around the phase transition points. For a Kerr-Newmann-AdS (KN-AdS) black hole, the extrinsic curvature of $Q \to 0$ hypersurface (Kerr black hole) or $J \to 0$ hypersurface (RN black black hole) has the same sign as the heat capacity around the phase transition points. The extrinsic curvature also diverges at the phase transition points. The intrinsic curvature of the hypersurfaces diverges at the critical points but has no information about the sign of the heat capacity. Our study explains the consistent relationship holding between the thermodynamic geometry of the KN-AdS black holes and those of the RN and Kerr ones \cite{ref1}. This approach can be easily generalized to an arbitrary thermodynamic system.Comment: 10 pages, 4 figure

Clinical Management of Dens Invaginatus Type 3: A Case Report

ABSTRACT: Dens invagination (DI) is a developmental abnormality of teeth which frequently results in a complex internal anatomy of the root canal system. DI type 3 is an anomaly characterized by infolding of enamel and dentin extending into the root apex. This may present difficulties when forming a diagnosis and treatment plan. Many treatment modalities have been presented in case reports for DI type 3, but there is insufficient evidence to recommend a therapy. This case report presents the successful non surgical root canal treatment of a maxillary canine with an open apex DI type 3, necrotic pulp, and an associated large periradicular lesion

Steps for Creating two Persian Specialized Corpora

Currently, most linguistic studies benefit from valid linguistic data available at corpora. Compiling corpora is a common practice in linguistic research. The present study introduces two specialized corpora in Persian; a specialized corpus is used to study a particular type of language or language variety. For building such corpora, first, a set of texts were compiled based on pre-established criteria used in the sampling process (including the mode of the texts, type of the texts, domain of the texts, language/ language varieties of the texts and the date of the texts). The corpora are specialized because they include technical terms in information processing and management, librarianship, linguistics, computational linguistics, thesaurus building, managing, policy-making, natural language processing, information technology, information retrieval, ontology and other related interdisciplinary domains. After compiling data and Metadata, the texts were preprocessed (normalized and tokenized) and annotated (automated POS tagging); finally, the tags were manually checked. Each corpus includes more than four million words. Since not many specialized corpora are built in Persian, such corpora could be considered valuable resources for researchers interested in studying linguistic variations in Persian interdisciplinary texts.https://dorl.net/dor/20.1001.1.20088302.2022.20.4.14.

Studying effect of intellectual capital on insurance demand increase: case study; Asia insurance company

Difference in the companies' performance is resulted by the fact that successful organizations have strategic resources (physical, human, and structural) that their Competitors doesn't have. So, difference in these resources have prominent role to create benefit for companies. The main purpose of the present study is to study intellectual capital effect on insurance demand increase in Asia insurance company and tries to study the effect of three dimensions of intellectual capital (human, structural and customer) on insurance demand increase in Asia insurance company. Research method in terms of the goal is applicable, and in terms of the study method is descriptive and is of survey branch. Population of the study consists of all officers of central organizations of Asia insurance company in Tehran. The sample size is 132 officers of the central office of Asia Insurance Company. Data collected by questionnaire and analyzed by One Sample T-Test. The results indicate that intellectual capital and it's dimensions, have effect on insurance demand increase in Asia insurance company

Does accountability discharged through performance measurement system?

This paper discusses the relevant literatures with regard to the conceptualization of accountability from different perspectives, particularly from private and public sector.The importance of discharging accountability and related problems are also discussed in the paper.The next section of the paper deals with the linkages between accountability and performance measurement system comprising the issues of using performance measurement in the public sector and other implementation issues.The discussion of these issues is then relates to the philosophy of new public management (NPM) being adopted by public sector.The conflicting results on the roles of NPM in enhancing effectiveness are also being articulated, blending together the human aspects and the cultural values as pre-requisites for the success

Conceptual Design and Comparative Study of Strut-Braced Wing and Twin-Fuselage Aircraft Configurations with Ultra-High Aspect Ratio Wings

Sustainable and fuel-efficient next-generation air transportation demands a step change in aircraft performance. The ultra-high aspect ratio wings (UHARW) configuration is one key enabling strategy for improving aircraft aerodynamic efficiency and reducing fuel consumption and emissions. Unconventional aircraft configurations and novel airframe technologies are required to address the large bending moment, and shear stresses in the UHARW structure. This paper considers two promising unconventional configurations suitable for adopting UHARW design, including strut-braced-wing (SBW) and twin-fuselage (TF), equipped with novel airframe technologies, i.e., active flow control, active load alleviation, and novel airframe structures and materials. Three typical missions, including short-range (SR), medium-range (MR), and long-range (LR), are considered for aircraft design. A conceptual design and performance analysis framework for the SBW and TF configurations with novel airframe technologies is developed in this paper by integrating and improving several methods and tools. According to the mission profile and top-level requirements proposed for each mission, an SBW and a TF configuration are designed for each class of aircraft. A comparative study is carried out to determine the best-in-class configuration of the corresponding mission. The results showed that the TF configuration has a better wing weight reduction effect than the SBW configuration, and the MR-TF and LR-TF aircraft have lower takeoff weight and fuel weight than the SBW aircraft for the same mission. However, due to the adjustment of the dimensions for the cabin arrangement of the SR-TF aircraft, the SBW configuration outperforms the TF configuration in this mission