cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Recovery Marketing for Economies after Devastation. A Multi-Case Research
Creators: name: Palmeira, Mirian
name: Semprebon, Elder
Publisher: name: International Journal of Economic Behavior
Year: 2020

description: The aim is to identify if Recovery Marketing is a Fresh Start Tool for economies after devastation. Through Multi-method study, with a qualitative study based on a Multi-case research with emphasis in Historic Method and Content’s Analyses, and secondary data analyses of some cases of devastated economies, the results show that there are the use of some Marketing Tools and Features, however without a holistic Marketing Approach and either no Recovery Marketing concept as a Fresh Start Tool to renew the place identity after catastrophes. A theoretical contribution of this paper is to produce a new marketing framework as a Fresh Start approach for places after destructions, such as Recovery Marketing, including the analyses of locals and visitors. The managerial implication is the contribution for public and private organisations to help positioning/repositioning a place after devastation, using Recovery Marketing as a Fresh Start Tool.
description: International Journal of Economic Behavior, Vol 10, No 1 (2020): International Journal of Economic Behavior
Towards a better understanding of the bidirectional relationship between decision-making and addiction vulnerability
Creators: name: Hrelja, Kelly M.
Publisher: name: University of British Columbia
Year: 2024

description: Impaired decision-making is recognized as a diagnostic criterion for many different psychiatric disorders including gambling disorder and substance use disorders. Habit formation and cue responsivity are known to play a role in driving these disorders, but less is known as to if and how decision-making is differentially altered by different classes of abused drugs. The impact of biological sex is also vastly understudied in such contexts. To gain further understanding on the bi-directional relationship between decision-making impairments and addiction, we combined the well-established rat gambling task with volitional drug self-administration in both male and female rats. In one aim, I sought to pharmacologically manipulate habit formation via the systemic administration of a histone deacetylation inhibitor. I found that inhibiting histone deacetylation resulted in increased risky choice during acquisition of our rat gambling task, while also altering how rats were learning from task outcomes. In another aim, I sought to further characterize the effect of cues on decision-making by allowing rats to choose between the cued and uncued rat gambling task on a trial-by-trial basis. I found that cues had negative effects on cognition, despite being preferred to their absence. I then paired this task with cocaine self-administration to investigate the bi-directional effects of gambling and cocaine-taking. I found evidence for cocaine-induced motivational deficits on subsequent gambling sessions. In my final aim, I sought to determine whether fentanyl could induce the same decision-making impairments that we had previously observed in response to cocaine. I found that while acute fentanyl self-administration did not impact cognition, fentanyl withdrawal did have long-lasting negative effects on decision-making.
X-ray and UV observations of nova V598 Puppis between 147 and 255 days after outburst
Creators: name: Page, K. L.
name: Osborne, J. P.
name: Read, A. M.
name: Evans, P. A.
name: Ness, J. -U.
name: Beardmore, A. P.
name: Bode, M.
name: Schwarz, G. J.
name: Starrfield, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Aims: The launch of Swift has allowed many more novae to be observed regularly over the X-ray band. Such X-ray observations of novae can reveal ejecta shocks and the nuclear burning white dwarf, allowing estimates to be made of the ejecta velocity. Methods: We analyse XMM-Newton and Swift X-ray and UV observations of the nova V598 Pup, which was initially discovered in the XMM-Newton slew survey. These data were obtained between 147 and 255 days after the nova outburst, and are compared with the earlier, brighter slew detection. Results: The X-ray spectrum consists of a super-soft source, with the soft emission becoming hotter and much fainter between days ~147 and ~172 after the outburst, and a more slowly declining optically thin component, formed by shocks with kT ~ 200-800 eV (corresponding to velocities of 400-800 km s^-1). The main super-soft phase had a duration of less than 130 days. The Reflection Grating Spectrometer data show evidence of emission lines consistent with optically thin emission of kT ~100 eV and place a limit on the density of the surrounding medium of log(n_e/cm^-3) < 10.4 at the 90 % level. The UV emission is variable over short timescales and fades by at least one magnitude (at lambda ~ 2246-2600 angstrom) between days 169 and 255.
description: 6 pages, 5 figures, accepted for publication in A&A
A fuzzy clustering algorithm for developing predictive models in construction applications
Creators: Seresht, Nima Gerami
Lourenzutti, Rodolfo
Robinson Fayek, Aminah
Publisher: name: University of Alberta Library
Year: 2020

Fuzzy inference systems (FISs) are a predictive modeling technique based on fuzzy sets that utilize approximate reasoning to mimic the decision-making process of human experts. There are several expert- and data-driven methods for developing FISs, among which fuzzy clustering algorithms are the most frequently used data-driven methods. This paper introduces a new fuzzy clustering algorithm for developing FISs in construction applications that addresses two limitations of existing fuzzy clustering algorithms: the lack of capacity to determine the number of clusters automatically from the characteristics of the data, and the poor performance in predictive modeling of highly dimensional problems. Existing fuzzy clustering algorithms are limited in construction applications since determining the number of clusters based on subjective expert judgment reduces the accuracy of the resulting FIS, and construction systems are often highly dimensional with a large number of inputs affecting the system outputs. The fuzzy clustering algorithm proposed in this paper determines the number of clusters automatically based on the characteristics of the data, specifically the non-linearity observed within clusters, and assigns weights to the rules of FISs to improve their accuracy in highly dimensional problems. This paper advances the state-of-the-art of fuzzy clustering and contributes to construction modeling by providing a new data-driven technique for developing FISs that suits the characteristics of construction problems.
Global Strategies and Entrepreneurial Firms: The Role of the Entrepreneur’s Features in the Decision-Making Process
Creators: name: Benevolo, Clara
name: Penco, Lara
name: Torre, Teresina
Publisher: name: International Journal of Economic Behavior
Year: 2020

description: The purpose of this paper is to deepen knowledge of entrepreneurial decision-making about global strategies. Towards this goal, it presents a conceptual framework useful for supporting entrepreneurial decisions for globalisation, drawing on an integrated analysis of the external environment and of the internal components, with a specific focus on entrepreneur’s characteristics, in terms of cognitive and emotional profiles. It is suggested to adopt a logical process to identify which strategic levers are available for global players to implement their global strategies. The paper provides several implications. In terms of theoretical implications, existing studies are based on the industrial organization-based theory or on the resource-based theory, while an integrated analysis combining these two aspects seems to be lacking. The proposed framework represents a complete and integrated one devoted to global strategies orientation, it also inserts the ‘entrepreneur matter’ as a variable that affects both the decision-making process and the global decisions’ contents. With regard to managerial implications, this framework can help global entrepreneurial firms or future global entrepreneurial firms to face problems related to the global dimension and make decisions to define the strategic levers for globalisation. It proposes the description of the various variables connected to the external environment, the features of the internal firm, and the personal traits of the entrepreneur, all elements which an entrepreneur-decision-maker should take into account during the decision-making process to attain a successful decision.
description: International Journal of Economic Behavior, Vol 10, No 1 (2020): International Journal of Economic Behavior
Pt-incorporated anatase TiO2(001) surface for solar cell applications : First-principles density functional theory calculations
Creators: name: Mete, E.
name: Uner, D.
name: Gulseren, O.
name: Ellialtioglu, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: First-principles density functional theory calculations were carried out to determine the low energy geometries of anatase TiO$_2$(001) with Pt implants in the sublayers as substitutional and interstitial impurities as well as on the surface in the form of adsorbates. We investigated the effect of such a systematic Pt incorporation in the electronic structure of this surface for isolated and interacting impurities with an emphasis on the reduction in the band gap to visible region. Comprehensive calculations, for 1x1 surface, showed that Pt ions at interstitial cavities result in local segregation, forming metallic wires inside, while substitution for bulk Ti and adsorption drives four strongly dispersed impurity states from valence-bands up in the gap with a narrowing of ~1.5 eV. Hence, such a contiguous Pt incorporation drives anatase into infrared regime. Pt substitution for the surface Ti, on the other hand, metallizes the surface. Systematic trends for 2x2 surface revealed that Pt can be encapsulated inside to form stable structures as a result of strong Pt-O interactions as well as the adsorptional and substitutional cases. Dilute impurities considered for 2x2 surface models exhibit flat-like defect states driven from the valence bands narrowing the energy gap suitable to obtain visible light responsive titania.
description: 15 pages, 8 figures, 4 tables. to appear on Phys. Rev B
Scientific CMOS sensors in Astronomy: IMX455 and IMX411
Creators: name: Alarcon, Miguel R.
name: Licandro, Javier
name: Serra-Ricart, Miquel
name: Joven, Enrique
name: Gaitan, Vicens
name: de Sousa, Rebeca
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Scientific complementary metal-oxide-semiconductor (CMOS) detectors have developed quickly in recent years thanks to their low cost and high availability. They also have some advantages over charge-coupled devices (CCDs), such as high frame rate or typically lower readout noise. These sensors started to be used in astronomy following the development of the first back-illuminated models. Therefore, it is worth studying their characteristics, advantages, and weaknesses. One of the most widespread CMOS sensors are those from the Sony IMX series, which are included in large astronomical survey projects based on small and fast telescopes because of their low cost, and capability for wide-field and high-cadence surveys. In this paper, we aim to characterize the IMX455M and IMX411M sensors, which are integrated into the QHY600 and QHY411 cameras, respectively, for use in astronomical observations. These are large (36 $\times$ 24 and 54 $\times$ 40 mm) native 16 bit sensors with 3.76 $μ$m pixels and are sensitive in the optical range. We present the results of the laboratory characterization of both cameras. They showed a very low dark current of 0.011 and 0.007 e$^{-}$ px$^{-1}$ s$^{-1}$ @$-$10 C for the QHY600 and QHY411 cameras, respectively. They also show the presence of warm pixels, $\sim$0.024% in the QHY600 and 0.005% in the QHY411. Warm pixels proved to be stable and linear with exposure time, and are therefore easily corrected using dark frames. Pixels affected by the Salt \& Pepper noise are $\sim$2% of the total and a method to correct for this effect is presented. Both cameras were attached to night telescopes and several on-sky tests were performed to prove their capabilities. On-sky tests demonstrate that these CMOS behave as well as CCDs of similar characteristics and (for example) they can attain photometric accuracies of a few milli-magnitudes.
description: 17 pages, 15 figures. Accepted for publication in PASP
Women’s Presence on European Boards and The Performance Cycle of Value Creation as an Instrument to Achieve the Gender Quotas
Creators: name: BINDER, BETTINA C.K.
Publisher: name: International Journal of Economic Behavior
Year: 2020

description: Value creation is a major claim of most companies. Mahajan (2017) argues that “value and value creation are natural to and basic in human behaviour and endeavour”, nevertheless women are often marginalized and impeded in their advancement towards leadership positions, where they could shape and influence the process of value creation. Many large companies in Europe include mainly men in supervisory boards and the women quota is often lower than 20 %. We offer an overview of the women’s presence on the boards of the EURO STOXX 50 companies and we develop a model, which presents eight steps in a strategic performance cycle showing how more women can be integrated in supervisory and management boards so that they can contribute to a better company value in general. The main contribution consists in offering companies a strategic instrument and concrete advices on how the women presence can be increased company-wide and the gender quota on boards can be achieved.
description: International Journal of Economic Behavior, Vol 10, No 1 (2020): International Journal of Economic Behavior
Limiting absorption principle for some long range perturbations of Dirac systems at threshold energies
Creators: name: Boussaid, Nabile
name: Golénia, Sylvain
Publisher: name: arXiv
Year: 2009
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We establish a limiting absorption principle for some long range perturbations of the Dirac systems at threshold energies. We cover multi-center interactions with small coupling constants. The analysis is reduced to study a family of non-self-adjoint operators. The technique is based on a positive commutator theory for non self-adjoint operators, which we develop in appendix. We also discuss some applications to the dispersive Helmholzt model in the quantum regime.
Critical properties of a trapped interacting Bose gas
Creators: name: Bezett, A.
name: Blakie, P. B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We develop a practical theoretical formalism for studying the critical properties of a trapped Bose-Einstein condensate using the projected Gross-Pitaevskii equation. We show that this approach allows us investigate the behavior of the correlation length, condensate mode and its number fluctuations about the critical point. Motivated by recent experiments [Science {\bf 315}, 1556 (2007)] we calculate the critical exponent for the correlation length, observe clear finite-size effects, and develop characteristic length scales to characterize the finite-size influences. We extend the Binder cumulant to the trapped system and discuss an experimental method for measuring number fluctuations.
description: 10 pages, 9 figures
Born International Spin-Offs in an Italian Industrial District: An Exploratory Study on Two Range Hood Producers
Creators: name: Bellagamba, Aldo
Publisher: name: International Journal of Economic Behavior
Year: 2020

description: The paper analyzes the peculiarities and the drivers of the accelerated internationalization strategies of two range hood manufacturers, born as spin-offs, in a small Italian district. Spin-offs are very frequent within industrial districts and can be considered an important way of transferring tacit knowledge from an existing firm to a newly formed one. The present work fits into this cognitive perspective and aims to understand the role played by the founders’ learning processes and the relationships established in previous work activities in the creation of born global firms. This study differs from earlier works on born global firms for two main reasons: a) the object of analysis is a specific sector and a given production hub; b) the phenomenon is examined through the multiple case analysis explorative method. The research not only highlights the regional character of the phenomena, but also delves into the role played by certain external factors (which affect the different attractiveness of foreign markets compared to the domestic one). A further significant aspect emerging from the investigation, relates the founders’ previous working experiences (as an employee/manager), representing a time of learning and development of personal relationships which are able to facilitate the process of accelerated internationalization of the new firm.
description: International Journal of Economic Behavior, Vol 10, No 1 (2020): International Journal of Economic Behavior
Additional file 1 of The optimal minimum lymph node count for carcinoembryonic antigen elevated colon cancer: a population-based study in the SEER set and External set
Creators: name: Zhang, Hao
name: Wang, Chunlin
name: Liu, Yunxiao
name: Hu, Hanqing
name: Tang, Qingchao
name: Huang, Rui
name: Wang, Meng
name: Wang, Guiyu
Publisher: name: figshare
Year: 2023
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Molecular Biology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Plant Biology

description: Additional file 1.
The first Efforts of Balsha III and his mother Helena to take Shkodra and surroundings at the beginning of the XV Century
Creators: name: Malaj, Edmond
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)

description: The paper we are presenting below deals with a short part of the history of medieval Shkodra, which is the passage of this town with surroundings under Venetian rule, realized by George II Strasimir Balsha, and then the efforts made by George himself or his son Balsha III and his mother Helena Balsha, for the restoration of these lands under their rule. These efforts are divided into two culminating points that are: 1. The uprisings against the Venetians and the Balsha III War during the years 1404-1405, which in some studies is also known as Balsha III’s 1st War for Shkodra, and; 2. The events of 1418, during which Balsha III and his mother try again to take Shkodra to the Venetians. These events are also encountered with the designation as the Second War of Balsha III for the acquisition of Shkodra. We will handle in this article only the first period dealing with the uprisings against the Venetians and the Balsha III War during the years 1404-1405 to take Shkodra and its surroundings.
Resolving the dusty circumstellar environment of the A[e] supergiant HD 62623 with the VLTI/MIDI
Creators: name: Meilland, A.
name: Kanaan, S.
name: Fernandes, M. Borges
name: Chesneau, O.
name: Millour, F.
name: Stee, Ph.
name: Lopez, B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: B[e] stars are hot stars surrounded by circumstellar gas and dust responsible for the presence of emission lines and IR-excess in their spectra. How dust can be formed in this highly illuminated and diluted environment remains an open issue. HD 62623 is one of the very few A-type supergiants showing the B[e] phenomenon. We obtained nine calibrated visibility measurements using the VLTI/MIDI instrument in SCI-PHOT mode and PRISM spectral dispersion mode with projected baselines ranging from 13 to 71 m and with various position angles. We used geometrical models and physical modeling with a radiative transfer code to analyze these data. The dusty circumstellar environment of HD 62623 is partially resolved by the VLTI/MIDI even with the shortest baselines. The environment is flattened and can be separated into two components: a compact one whose extension grows from 17 mas at 8 microns to 30 mas at 9.6 microns and stays almost constant up to 13 microns, and a more extended one that is over-resolved even with the shortest baselines. Using the radiative transfer code MC3D, we managed to model HD 62623's circumstellar environment as a dusty disk with an inner radius of 3.85+-0.6 AU, an inclination angle of 60+-10 deg, and a mass of 2x10^-7Mo. It is the first time that the dusty disk inner rim of a supergiant star exhibiting the B[e] phenomenon is significantly constrained. The inner gaseous envelope likely contributes up to 20% to the total N band flux and acts like a reprocessing disk. Finally, the hypothesis of a stellar wind deceleration by the companion's gravitational effects remains the most probable case since the bi-stability mechanism does not seem to be efficient for this star.
description: 13 pages, 11 figures. A&A accepted paper
Improved noise performance from the next-generation buried-channel p-Mosfet SiSeROs
Creators: name: Chattopadhyay, Tanmoy
name: Herrmann, Sven
name: Kaplan, Matthew
name: Orel, Peter
name: Donlon, Kevan
name: Prigozhin, Gregory
name: Morris, R. Glenn
name: Cooper, Michael
name: Malonis, Andrew
name: Allen, Steven W.
name: Bautz, Marshall W.
name: Leitz, Chris
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The Single electron Sensitive Read Out (SiSeRO) is a novel on-chip charge detector output stage for charge-coupled device (CCD) image sensors. Developed at MIT Lincoln Laboratory, this technology uses a p-MOSFET transistor with a depleted internal gate beneath the transistor channel. The transistor source-drain current is modulated by the transfer of charge into the internal gate. At Stanford, we have developed a readout module based on the drain current of the on-chip transistor to characterize the device. In our earlier work, we characterized a number of first prototype SiSeROs with the MOSFET transistor channels at the surface layer. An equivalent noise charge (ENC) of around 15 electrons root mean square (RMS) was obtained. In this work, we examine the first buried-channel SiSeRO. We have achieved substantially improved noise performance of around 4.5 electrons root mean square (RMS) and a full width half maximum (FWHM) energy resolution of 132 eV at 5.9 keV, for a readout speed of 625 kpixel/s. We also discuss how digital filtering techniques can be used to further improve the SiSeRO noise performance. Additional measurements and device simulations will be essential to further mature the SiSeRO technology. This new device class presents an exciting new technology for the next-generation astronomical X-ray telescopes requiring fast, low-noise, radiation-hard megapixel imagers with moderate spectroscopic resolution.
description: Accepted in Journal of Astronomical Telescopes, Instruments, and Systems (JATIS). arXiv admin note: text overlap with arXiv:2208.01082
Fermionic dark matter-photon quantum interaction: A mechanism for darkness
Creators: name: de Gracia, G. B.
name: Nogueira, A. A.
name: da Rocha, R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Mass dimension one fermionic fields are prime candidates to describe dark matter, due to their intrinsic neutral nature, as they are constructed as eigenstates of the charge conjugation operator with dual helicity. To formulate the meaning of the darkness, the fermion-photon coupling is scrutinized with a Pauli-like interaction, and the path integral is then formulated from the phase space constraint structure. Ward-Takahashi-like identities and Schwinger-Dyson equations, together with renormalizability, are employed to investigate a phenomenological mechanism to avoid external light signals. Accordingly, the non-polarized pair annihilation and Compton-like processes are shown to vanish at the limit of small scattering angles even if considering 1-loop radiative corrections, reinforcing the dark matter interpretation. However, dark matter interactions with nucleons are still possible. Motivated by recent nucleon-recoil experiments to detect dark matter, we furnish a consistent theoretical setup to describe interaction with the photon compatible with the prevalence of darkness.
description: 42 pages, 6 figures
Foreign market entry decision-making: what do we know so far?
Creators: name: Guercini, Simone
name: Milanesi, Matilde
name: Runfola, Andrea
Publisher: name: International Journal of Economic Behavior
Year: 2020

description: The paper proposes a systematic review of the literature on foreign market entry decision-making. The decision-making process in this area is particularly challenging for companies, given the lack of familiarity with an international environment characterized by increasing complexity and, therefore, a high level of uncertainty. The article adopts a systematic approach to reviewing the literature, to investigate the state of research on the topic, as well as the main theoretical approaches and decision-making processes for entering foreign markets. A total of 64 articles published in international business and international marketing journals are examined. The paper proposes a descriptive and thematic analysis of the articles and highlights the main theoretical approaches adopted, the declinations of the concept of uncertainty, and the entry modes as decision-making contexts. Finally, the paper suggests future directions for research.
description: International Journal of Economic Behavior, Vol 10, No 1 (2020): International Journal of Economic Behavior
Can room temperature data for tunneling molecular junctions be analyzed within a theoretical framework assuming zero temperature?
Creators: name: Baldea, Ioan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Routinely, experiments on tunneling molecular junctions report values of conductances ($G_{RT}$) and currents ($I_{RT}$) measured at room temperature. On the other side, theoretical approaches based on simplified models provide analytic formulas for the conductance ($G_{0K}$) and current ($I_{0K}$) valid at zero temperature. Therefore, interrogating the applicability of the theoretical results deduced in the zero temperature limit to real experimental situations at room temperature i.e., $G_{RT} \approx G_{0K}$ and $I_{RT} \approx I_{0K}$) is a relevant aspect. Quantifying the pertaining temperature impact on the transport properties computed within the ubiquitous single level model with Lorentzian transmission is the specific aim of the present work. Comprehensive results are presented for broad ranges of the relevant parameters (level's energy offset $\varepsilon_0$ and width $Γ_a $, and applied bias $V$) that safely cover values characterizing currently fabricated junctions. They demonstrate that the strongest thermal effects occur at biases below resonance ($2 \left\vert \varepsilon_0 \right\vert - δ\varepsilon_0 \alt \vert e V\vert \alt 2 \left\vert \varepsilon_0 \right\vert$). At fixed $V$, they affect an $\varepsilon_0$-range whose largest width $δ\varepsilon_0 $ is about nine times larger than the thermal energy ($δ\varepsilon_0 \approx 3 πk_B T$) at $Γ_a \to 0$. The numerous figures included aim at conveying a quick overview on the applicability of the zero temperature limit to a specific real junction. In quantitative terms, the conditions of applicability are expressed as mathematical inequalities involving elementary functions. They constitute the basis of an interactive data fitting procedure proposed, which aims at guiding experimentalists interested in data processing in a specific case.
The magnetic precursor of L1448-mm: Excitation differences between ion and neutral fluids
Creators: name: Roberts, Julia
name: Jiménez-Serra, Izaskun
name: Martín-Pintado, Jesús
name: Viti, Serena
name: Rodríguez-Franco, Arturo
name: Faure, Alexandre
name: Tennyson, Jonathan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Shock modelling predicts an electron density enhancement within the magnetic precursor of C-shocks. Previous observations of SiO, H13CO+, HN13C and H13CN toward the young L1448-mm outflow showed an over-excitation of the ion fluid that was attributed to an electron density enhancement in the precursor. We re-visit this interpretation and test if it still holds when we consider different source morphologies and kinetic temperatures for the observed molecules, and also give some insight on the spatial extent of the electron density enhancement around L1448-mm. We estimate the opacities of H13CO+ and HN13C by observing the J=3\to2 lines of rarer isotopologues to confirm that the emission is optically thin. To model the excitation of the molecules, we use the large velocity gradient (LVG) approximation with updated collisional coefficients to i) re- analyse the observations toward the positions where the over-excitation of H13CO+ has previously been observed [i.e. toward L1448- mm at offsets (0,0) and (0,-10)], and ii) to investigate if the electron density enhancement is still required for the cases of extended and compact emission, and for kinetic temperatures of up to 400 K. We also report several lines of SiO, HN13C and H13CO+ toward new positions around this outflow, to investigate the spatial extent of the over-excitation of the ions in L1448-mm. From the isotopologue observations, we find that the emission of H13CO+ and HN13C from the precursor is optically thin if this emission is extended. Using the new collisional coefficients, an electron density enhancement is still needed to explain the excitation of H13CO+ for extended emission and for gas temperatures of\le 400 K toward L1448-mm (0,-10), and possibly also toward L1448-mm (0,0). For compact emission the data cannot be fitted. We do not find any evidence for the over-excitation of the ion fluid toward the newly observed positions around L1448-mm. The observed line emission of SiO, H13CO+ and HN13C toward L1448-mm (0,0) and (0,-10) is consistent with an electron density enhancement in the precursor component, if this emission is spatially extended. This is also true for the case of high gas temperatures (\le400 K) toward the (0,-10) offset. The electron density enhancement seems to be restricted to the southern, redshifted lobe of the L1448-mm outflow. Interferometric images of the line emission of these molecules are needed to confirm the spatial extent of the over-excitation of the ions and thus, of the electron density enhancement in the magnetic precursor of L1448-mm.
description: Accepted for publication in A&A; 9 pages, 3 figures
Low-Complexity Three-Dimensional AOA-Cross Geometric Center Localization Methods via Multi-UAV network
Creators: name: Shi, Baihua
name: Li, Yifan
name: Wu, Guilu
name: Yan, Shihao
name: Shu, Feng
Publisher: name: arXiv
Year: 2023
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Angle of arrival (AOA) is widely used to locate a wireless signal emitter in unmanned aerial vehicle (UAV) localization. Compared with received signal strength (RSS) and time of arrival (TOA), it has higher accuracy and is not sensitive to time synchronization of the distributed sensors. However, there are few works focused on three-dimensional (3-D) scenario. Furthermore, although maximum likelihood estimator (MLE) has a relatively high performance, its computational complexity is ultra high. It is hard to employ it in practical applications. This paper proposed two multiplane geometric center based methods for 3-D AOA in UAV positioning. The first method could estimate the source position and angle measurement noise at the same time by seeking a center of the inscribed sphere, called CIS. Firstly, every sensor could measure two angles, azimuth angle and elevation angle. Based on that, two planes are constructed. Then, the estimated values of source position and angle noise are achieved by seeking the center and radius of the corresponding inscribed sphere. Deleting the estimation of the radius, the second algorithm, called MSD-LS, is born. It is not able to estimate angle noise but has lower computational complexity. Theoretical analysis and simulation results show that proposed methods could approach the Cramer-Rao lower bound (CRLB) and have lower complexity than MLE.
description: 7 pages, 5 figures
Investigating criteria and key characteristics of effective mnemonics in healthcare science
Creators: name: Pupkes, Jan
Publisher: name: OSF Registries
Year: 2024
Subjects: subject: Medicine and Health Sciences
subject: Medical Education
subject: Memory Aids
subject: Mnemonics

description: The central objective of this scoping review is to address the fundamental research question: "What criteria and key characteristics are essential for the development of effective mnemonics in healthcare science?" This will be pursued through the examination of specific sub questions that serve as guiding factors. The overarching goal is to provide a comprehensive understanding of the current state of mnemonics in healthcare related specialties and potentially guide the formulation of criteria for building new, effective mnemonics.
Partial K-way Negativities of Pure Four qubit Entangled States
Creators: name: Sharma, S. Shelly
name: Sharma, N. K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It has been shown by Versraete et. al [F. Versraete, J. Dehaene, B. De Moor, and H. Verschelde, Phys. Rev. A65, 052112 (2002)] that by stochastic local operations and classical communication (SLOCC), a pure state of four qubits can be transformed to a state belonging to one of a set of nine families of states. By using selective partial transposition, we construct partial K-way negativities to measure the genuine 4-partite, tripartite, and bi-partite entanglement of single copy states belonging to the nine families of four qubit states. Partial K-way negativities are polynomial functions of local invariants characterizing each family of states as such entanglement monotones.
description: 15 pages, 5 figures, Additions to section II, Typos corrected
Development and implementation of multi-agent cyber-physical systems for vision-based structural health monitoring
Creators: name: Azimi, Mohsen
Publisher: name: University of British Columbia
Year: 2024

description: Advances in computer vision and automated data collection methods, such as the integration of physical and computational components in cyber-physical systems, have provided opportunities for rapid and automated monitoring of infrastructures. The recent shift towards edge computing in AI-based applications has enabled data processing closer to the source, reducing the need for costly data transmission and providing a real-time response with lower latency and cost. Additionally, this approach can extend operations to remote locations where reliable high-speed internet is inaccessible. The application of mobile robots in various fields, including structural health monitoring, has gained significant attention in recent years. However, research and development in unmanned vehicles for structural health monitoring has been limited and primarily focuses on manual outdoor operations with GPS availability. Indoor operations, such as construction site hazard inspections or indoor mapping, pose significant navigation and data collection challenges. An intelligent ground robot equipped with advanced hardware and software is needed to efficiently collect high-resolution data for structural health monitoring and navigation, process information in real-time, and save data for post-processing. The integration of robots has accelerated data collection and processing in structural health monitoring. However, current applications need more autonomous capabilities, leading to time-consuming, subjective, and expensive applications. To address the limitations of the earlier studies and fill the gaps found in the literature, this dissertation proposes an affordable solution for SHM using a cyber-physical system that incorporates both unmanned aerial vehicles and unmanned ground vehicles through a wireless robot operating system network. In addition, a novel transformer-based technique is proposed in this dissertation for high-resolution image segmentation to enable more accurate detection and quantification of structural elements and damages. The key feature and contribution of the proposed method are to achieve high-accuracy pixel-level segmentation in a faster way. An extension of image segmentation is developed to process point cloud data generated from 3D mapping and 3D scene reconstruction.
Spatio-temporal non-localities in a solar-like mean-field dynamo
Creators: name: Pipin, V. V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The scale separation approximation, which is in the base of the solar mean field dynamo models, can be hardly justified both by observations and theoretical applications to astrophysical dynamos.{ The general expression for the mean turbulent electromotive force can be written in integral form with convolution of the turbulent effects and mean magnetic field variations over scales of the turbulent flows and global scales of the mean field dynamo. Following results of DNS, which had been reported earlier, we take the Lorentzian form of the integral convolution kernels as an experimental fact. }It allows us to approximate the governing equation for the mean electromotive force by the reaction--diffusion type equation. Solution of the eigenvalue problem reveals a few curious properties of the dynamo model with the nonlocal mean electromotive force. We find a decrease of the critical dynamo instability threshold, and an increase the dynamo periods of the unstable modes, as reported in earlier studies. Simultaneously, the nonlocal model shows substantially lower growth rate of the unstable dynamo modes in proximity of the critical threshold than the model which employ the scale separation approximation. We verify these findings using the nonlinear solar dynamo model. For the supercritical regime, when the $α$ effect magnitude is about twice of the instability threshold, the model shows the Parker's dynamo wave solutions with the wave propagating from the mid latitude at the bottom of the convection zone toward the solar equator at the surface. In the weakly nonlinear regime, when the $α$ effect magnitude is near the instability threshold, the interference of the dynamo modes of different spatial localization shows the Grand activity cycles of a period about 300 years.
description: 10 pages, 8 Figures, published in MNRAS
Readout and data analysis circuits for silicon photonic evanescent field biosensors
Creators: name: Panda, Sarthak
Publisher: name: University of British Columbia
Year: 2024

description: Silicon Photonic (SiP) evanescent field biosensors exhibit promising potential for developing low-cost medical diagnostics. With modern silicon processes, hundreds of such sensors can be integrated, enabling simultaneous detection and processing of multiple biomarkers. Most state-of-the-art evanescent field sensors use resonance peak tracking to measure biomolecule concentrations. The simplicity of optics in such sensors makes them a perfect candidate for commercial scalability. However, they require complex processing to filter useful information from data distorted by noise and sensor artifacts. Contemporary sensors often rely on discrete computing units, rendering the system expensive and impractical for point-of-care (PoC) applications. Through innovative optics, coherent biosensors have paved the pathway for simplified electronics readout. This being said, achieving comparable performance to peak tracking sensors requires substantial changes in the design of coherent electronic readouts. For the global success of evanescent field sensors, it is imperative to integrate on-chip readouts without compromising performance. This thesis addresses this challenge through two main objectives. Firstly, a hardware-aware on-chip sensor-data processor is implemented for peak tracking evanescent field sensors, ensuring performance parity with discrete processors. Secondly, an electronic readout system is designed to improve the performance of coherent biosensors.
Fermion Masses and Mixing in Pati-Salam Unification with $S_3$ Modular Symmetry
Creators: name: Belfkir, Mohamed
name: Loualidi, Mohamed Amin
name: Nasri, Salah
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Modular invariance has recently paved new promising directions in flavor model building. Motivated by this development, we present in this work the first implementation of the $S_3$ modular symmetry within the Pati-Salam unification framework, addressing the flavor structure of quarks and leptons. Assigning left- and right-handed matter fields as $S_3$ doublets or singlets, we propose three benchmark models that achieve compelling fits to sixteen observables including charged fermion mass ratios and flavor mixing parameters. Light neutrino masses arise via the type-I seesaw mechanism, and neutrino oscillation parameters are explored in light of the latest NuFIT-6.0 results. All models favor a normal neutrino mass ordering, with the atmospheric mixing angle lie in the lower octant. For models I and III, the effective Majorana mass $m_{ββ}$ is within the reach of upcoming neutrinoless double-beta decay experiments, while it is too small to be detected in model II. Predicted leptonic CP-violating phases, the sum of active neutrino masses, and Majorana phases span wide but distinctive ranges, enabling future experiments to test and differentiate the proposed models.
description: 17 pages, 3 figures. Comments are welcome
พัฒนาการโดยสังเขปของระบบการแพทย์ฉุกเฉินในประเทศไทย
Creators: name: วิชัย โชควิวัฒน
Publisher: name: สถาบันการแพทย์ฉุกเฉินแห่งชาติ
Year: 2564
Subjects: ระบบการแพทย์ฉุกเฉิน
พัฒนาการ
ประเทศไทย

description: Journal of Emergency Medical Services of Thailand, 1, 1, 53-60
Improving the Data Efficiency of Multi-Objective Quality-Diversity through Gradient Assistance and Crowding Exploration
Creators: name: Janmohamed, Hannah
name: Pierrot, Thomas
name: Cully, Antoine
Publisher: name: arXiv
Year: 2023
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Quality-Diversity (QD) algorithms have recently gained traction as optimisation methods due to their effectiveness at escaping local optima and capability of generating wide-ranging and high-performing solutions. Recently, Multi-Objective MAP-Elites (MOME) extended the QD paradigm to the multi-objective setting by maintaining a Pareto front in each cell of a map-elites grid. MOME achieved a global performance that competed with NSGA-II and SPEA2, two well-established Multi-Objective Evolutionary Algorithms (MOEA), while also acquiring a diverse repertoire of solutions. However, MOME is limited by non-directed genetic search mechanisms which struggle in high-dimensional search spaces. In this work, we present Multi-Objective MAP-Elites with Policy-Gradient Assistance and Crowding-based Exploration (MOME-PGX): a new QD algorithm that extends MOME to improve its data efficiency and performance. MOME-PGX uses gradient-based optimisation to efficiently drive solutions towards higher performance. It also introduces crowding-based mechanisms to create an improved exploration strategy and to encourage uniformity across Pareto fronts. We evaluate MOME-PGX in four simulated robot locomotion tasks and demonstrate that it converges faster and to a higher performance than all other baselines. We show that MOME-PGX is between 4.3 and 42 times more data-efficient than MOME and doubles the performance of MOME, NSGA-II and SPEA2 in challenging environments.
description: Accepted GECCO 2023
CMB constraints on the early universe independent of late time cosmology
Creators: name: Lemos, Pablo
name: Lewis, Antony
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The CMB is a powerful probe of early-universe physics but is only observed after passing through large-scale structure, which changes the observed spectra in important model-dependent ways. This is of particular concern given recent claims of significant discrepancies with low redshift data sets when a standard $Λ$CDM model is assumed. By using empirical measurements of the CMB lensing reconstruction, combined with weak priors on the smoothness of the lensing spectrum, foregrounds, and shape of any additional integrated Sachs-Wolfe effect, we show how the early-universe parameters can be constrained from CMB observations almost independently of the late-time evolution. This provides a way to test new models for early-universe physics, and measure early-universe parameters, independently of late-time cosmology. Using the empirical measurement of lensing keeps the size of the effect of late-time modelling uncertainty under control, leading to only modest increases in error bars of most early-universe parameters compared to assuming a full evolution model. We provide robust constraints on early-$Λ$CDM model parameters using the latest Planck PR4 data and show that with future data marginalizing over a single lensing amplitude parameter is sufficient to remove sensitivity to late-time cosmological model only if the spectral shape matches predictions.
description: 9 pages, 5 figures