Konstantin V. Getman, Oleg Kochukhov, Joe P. Ninan
et al.
We explore the empirical power-law relationship between X-ray luminosity (Lx) and total surface magnetic flux (Phi), established across solar magnetic elements, time- and disk-averaged emission from the Sun, older active stars, and pre-main-sequence (PMS) stars. Previous models of large PMS X-ray flares, lacking direct magnetic field measurements, showed discrepancies from this baseline law, which MHD simulations attribute to unusually strong magnetic fields during flares. To test this, we used nearly simultaneous Chandra X-ray and HET-HPF near-infrared observations of four young Orion stars, measuring surface magnetic fields during or just after powerful PMS X-ray flares. We also modeled these PMS X-ray flares, incorporating their measured magnetic field strengths. Our findings reveal magnetic field strengths at the stellar surface typical of non-flaring PMS stars, ruling out the need for abnormally strong fields during flares. Both PMS and solar flares deviate from the Lx-Phi law, with PMS flares exhibiting a more pronounced deviation, primarily due to their much larger active regions on the surface and larger flaring loop volumes above the surface compared to their solar counterparts. These deviations likely stem from the fact that powerful flares are driven by magnetic reconnection, while baseline X-ray emission may involve less efficient mechanisms like Alfven wave heating. Our results also indicate a preference for dipolar magnetic loops in PMS flares, consistent with Zeeman-Doppler imaging of fully convective stars. This requirement for giant dipolar loops aligns with MHD predictions of strong dipoles supported by polar magnetic surface active regions in fast-rotating, fully convective stars.
As Islamic banks grow and evolve, pricing methods for their services have become essential to study and implement. This study highlights the significance of understanding the factors influencing Islamic banking service pricing in Algeria. The study aims to analyze how Islamic banks price their services, with a focus on cost, market, and value strategies. Additionally, it seeks to evaluate and recommend ways to enhance the current practices of banks operating in the national market. Algeria is experiencing rapid growth in Islamic banking, making it an ideal location to study this subject. The country is home to two Islamic banks, Al Baraka Bank and Al Salam Bank. Algeria was selected as a new market to allow the findings to be applicable to similar situations elsewhere. The research utilizes secondary data obtained from available information on Islamic bank service fees, comparing them with those of traditional banks. It also conducts financing simulations in both banks and compares them with the traditional theoretical framework. Data was gathered from various sources, including bank websites, annual reports, and previous studies. The research reveals that Algerian Islamic banks do not prioritize scientific methods in pricing their services. The results suggest that these banks operate within a traditional framework under the oversight of the central bank. The central bank's rules depend on the prices of services conventional banks offer. This shapes how customers perceive these banks as representatives of Islamic banking. Islamic banks can utilize the study's results to develop pricing strategies that are more effective and compliant with Islamic law. Regulators can utilize these findings to formulate enhanced policies to bolster the Islamic banking sector. The results also assist researchers in delving deeper into the realm of Islamic banking service pricing. This study refutes the hypothesis that Algerian Islamic banks have enhanced the efficiency of their service pricing by adopting models in line with Islamic finance principles, such as profit-sharing, while considering market conditions and service value. They should embrace more pragmatic and beneficial pricing strategies that align with Islamic law, cater to customer needs, and enhance their competitiveness and value in the national banking market.
O presente trabalho visa discutir a questão do reabandono de crianças e adolescentes adotados após a sentença transitar em julgado e durante o estágio de convivência, com ênfase na necessidade de indenização. Para isso, será realizado um levantamento histórico acerca da adoção, desde a antiguidade até seu formato atual, abrangendo suas diversas etapas - habilitação, curso preparatório, estágio de convivência e adoção de fato - para contextualizar a discussão sobre o reabandono. Nesta senda, serão analisadas as motivações e dificuldades encontradas que levam os adotantes a optar por “devolver” uma criança ou adolescente à instituição de origem, bem como as implicações psicológicas e jurídicas e o impacto ocasionado em um caso real analisado. Posteriormente, o trabalho investigará o uso da responsabilidade civil na devolução do adotando, instituto já aplicado pela jurisprudência nos casos em que a adoção foi consolidada, e levantará questionamentos sobre a aplicação do instituto quando da desistência do processo durante o estágio de convivência. Para a concretização do trabalho, a abordagem metodológica utilizada fundamentou-se no método dedutivo, através de pesquisa bibliográfica e documental. Foi possível verificar, a partir do estudo, que a desistência do processo finalizado, bem como do processo que se encontra em fase avançada, gera diversos danos ao adotando, de forma que a lacuna encontrada na legislação acerca de disposição específica facilita a prática do ato ilícito pelos adotantes.
Matthew A. Bershady, Kyle B. Westfall, Shravan Shetty
et al.
We measure the age-velocity relationship from the lag between ionized gas and stellar tangential speeds in ~500 nearby disk galaxies from MaNGA in SDSS-IV. Selected galaxies are kinematically axisymmetric. Velocity lags are asymmetric drift, seen in the Milky Way's (MW) solar neighborhood and other Local Group galaxies; their amplitude correlates with stellar population age. The trend is qualitatively consistent in rate (d(sigma)/dt) with a simple power-law model where sigma is proportional to t^b that explains the dynamical phase-space stratification in the solar neighborhood. The model is generalized based on disk dynamical times to other radii and other galaxies. We find in-plane radial stratification parameters sigma_(0,r} (dispersion of the youngest populations) in the range of 10-40 km/s and 0.2<b_r<0.5 for MaNGA galaxies. Overall b_r increases with galaxy mass, decreases with radius for galaxies above 10.4 dex (M_solar) in stellar mass, but is ~constant with radius at lower mass. The measurement scatter indicates the stratification model is too simple to capture the complexity seen in the data, unsurprising given the many possible astrophysical processes that may lead to stellar population dynamical stratification. Nonetheless, the data show dynamical stratification is broadly present in the galaxy population, with systematic trends in mass and density. The amplitude of the asymmetric drift signal is larger for the MaNGA sample than the MW, and better represented in the mean by what is observed in the disks of M31 and M33. Either typical disks have higher surface-density or, more likely, are dynamically hotter (hence thicker) than the MW.
Sabyasachi Chattopadhyay, Matthew A. Bershady, David R. Law
et al.
We have re-observed $\rm\sim$40 low-inclination, star-forming galaxies from the MaNGA survey ($\upsigma\sim65$~\kms) at $\sim$6.5 times higher spectral resolution ($\upsigma\sim10$~\kms) using the HexPak integral field unit on the WIYN 3.5m telescope. The aim of these observations is to calibrate MaNGA's instrumental resolution and to characterize turbulence in the warm interstellar medium and ionized galactic outflows. Here we report the results for the H$\rm\upalpha$ region observations as they pertain to the calibration of MaNGA's spectral resolution. Remarkably, we find that the previously-reported MaNGA line-spread-function (LSF) Gaussian width is systematically underestimated by only 1\%. The LSF increase modestly reduces the characteristic dispersion of HII regions-dominated spectra sampled at 1-2 kpc spatial scales from 23 to 20 km s$^{-1}$ in our sample, or a 25\% decrease in the random-motion kinetic energy. This commensurately lowers the dispersion zeropoint in the relation between line-width and star-formation rate surface-density in galaxies sampled on the same spatial scale. This modest zero-point shift does not appear to alter the power-law slope in the relation between line-width and star-formation rate surface-density. We also show that adopting a scheme whereby corrected line-widths are computed as the square root of the median of the difference in the squared measured line width and the squared LSF Gaussian avoids biases and allows for lower SNR data to be used reliably.
International Clock, Oscillator Networking, Collaboration
et al.
Optical clocks have improved their frequency stability and estimated accuracy by more than two orders of magnitude over the best caesium microwave clocks that realise the SI second. Accordingly, an optical redefinition of the second has been widely discussed, prompting a need for the consistency of optical clocks to be verified worldwide. While satellite frequency links are sufficient to compare microwave clocks, a suitable method for comparing high-performance optical clocks over intercontinental distances is missing. Furthermore, remote comparisons over frequency links face fractional uncertainties of a few $10^{-18}$ due to imprecise knowledge of each clock's relativistic redshift, which stems from uncertainty in the geopotential determined at each distant location. Here, we report a landmark campaign towards the era of optical clocks, where, for the first time, state-of-the-art transportable optical clocks from Japan and Europe are brought together to demonstrate international comparisons that require neither a high-performance frequency link nor information on the geopotential difference between remote sites. Conversely, the reproducibility of the clocks after being transported between countries was sufficient to determine geopotential height offsets at the level of 4 cm. Our campaign paves the way for redefining the SI second and has a significant impact on various applications, including tests of general relativity, geodetic sensing for geosciences, precise navigation, and future timing networks.
We examine the contribution of Islamic legal institutions to the comparative economic decline of the Middle East behind Latin Europe, which can be observed since the late Middle Ages. To this end, we explore whether the sacralization of Islamic law and its focus on the Sharia as supreme, sacred and unchangeable legal text, which reached its culmination in the 13th century had an impact on economic development. We use the population size of 145 cities in Islamic countries and 648 European cities for the period 800-1800 as proxies for the level of economic development, and construct novel estimates of the number of law schools (i.e. madaris) and estimate their contribution to the pre-industrial economic development. Our triple-differences estimates show that a higher density of madrasas before the sacralization of Islamic law predicts a more vibrant urban economy characterized by higher urban growth. After the consolidation of the sharia sacralization of law in the 13th century, greater density of law schools is associated with stagnating population size. We show that the economic decline of the Middle East can be partly explained by the absence of legal innovations or substitutes of them, which paved the way for the economic rise of Latin Europe, where ground-breaking legal reforms introduced a series of legal innovations conducive for economic growth. We find that the number of learned lawyers trained in universities with law schools is highly and positively correlated with the western European city population. Our counterfactual estimates show that almost all Islamic cities under consideration would have had much larger size by the year 1700 if legal innovations comparable to those in Western Europe were introduced. By making use of a series of synthetic control and difference-in-differences estimators our findings are robust against a large number of model specification checks.
In this work, a day and night time vehicle detection system for traffic surveillance is proposed. Our system is composed of two main processes, day time and night time processes. In the night time, the vehicles are detected based on their taillights and headlights. First of all, the 2D-DWT (Two Dimensional Discrete Wavelet Transform) and the background subtraction are applied to the input image. Then, the connected component technique is used to extract the region of interest. If it is the daytime, the connected component candidates are taken as potential vehicles after applying a pre-processing algorithm to improve the result. If it is the night-time, a filtering operation is used to keep only the bright white and red connected component candidates (which represent potential headlights and taillights, respectively). Finally, potential lamp sets are formed by grouping the extracted components on the basis of their positions, sizes, and colours. The potential extracted vehicles are classified as a vehicle or non-vehicle by using a pre-trained CNN (Convolutional Neural Network) classifier. The proposed system was tested and evaluated using different works from the literature. The experiments show that our proposed system has reached a high accuracy in terms of vehicle detection process whether in day or night time. The experiments were performed using four different videos and were implemented using the C++ language, which facilitates mathematical computation, and its OpenCV library, which is used to run the image processing algorithms used, as well as the TensorFlow library, which facilitates transfer learning of pre-trained CNN models.
Fixed lexical or syntactical expressions and formulae hallmark legal language. They serve both linguistic and legal purposes, and should be rendered accordingly in a target language and legal system. Most of the times, however, formulaic expressions are translated by resorting to calques, false cognates, or phrases that are uncommon in the target legal language (and legal system). This paper is aimed at exploring how and if corpus analysis can dispel doubts and help find acceptable translation candidates. As there are currently no publicly available legal corpora addressing corporate documents such as contracts and agreements, this paper wishes to bridge this gap by building and relying on an ad hoc corpus of authentic agreements written in English as a first language according to the laws of England and Wales. In this way, corpus evidence can help find equivalents and, possibly, address recurrent mistranslations from Italian into English. During the corpus analysis process, the paper shows and discusses search queries and how equivalents can be obtained. At the same time, it questions dictionary entries. The paper findings highlight that the consultation of the ad hoc corpus allows to find acceptable translations of Italian legal formulae and address recurrent mistranslations. English formulaic expressions, in fact, can be rendered satisfactorily thanks to the possibility of noticing word usages in context, keywords in contexts and collocations. Further research can encompass a wider variety of formulae and/or legal documents so that scholars and translators can be equipped with useful reference tools.
Language. Linguistic theory. Comparative grammar, Comparative law. International uniform law
Magnetic topological states refer to a class of exotic phases in magnetic materials with their non-trivial topological property determined by magnetic spin configurations. An example of such states is the quantum anomalous Hall (QAH) state, which is a zero magnetic field manifestation of the quantum Hall effect. Current research in this direction focuses on QAH insulators with a thickness of less than 10nm. The thick QAH insulators in the three-dimensional(3D) regime are limited, largely due to inevitable bulk carriers being introduced in thick magnetic TI samples. Here, we employ molecular beam epitaxy (MBE) to synthesize magnetic TI trilayers with a thickness of up to ~106 nm. We find these samples exhibit well-quantized Hall resistance and vanishing longitudinal resistance at zero magnetic field. By varying magnetic dopants, gate voltages, temperature, and external magnetic fields, we examine the properties of these thick QAH insulators and demonstrate the robustness of the 3D QAH effect. The realization of the well-quantized 3D QAH effect indicates that the nonchiral side surface states of our thick magnetic TI trilayers are gapped and thus do not affect the QAH quantization. The 3D QAH insulators of hundred-nanometer thickness provide a promising platform for the exploration of fundamental physics, including axion physics and image magnetic monopole, and the advancement of electronic and spintronic devices to circumvent Moore's law.
La fiscalidad participativa supone un plexo epistémico que posibilita el empoderamiento ciudadano en la gestión integral de las finanzas públicas. Constituye un estado complejo de relaciones que posee como denominador común la democratización del soporte financiero de la labor estatal en general y administrativa en particular; su imbricación teórica con la economía social y solidaria como posición que privilegia los límites sociales al mercado, priorizando el papel de los productores, y los valores de solidaridad y fraternidad que se producen en el marco de las relaciones de distribución, cambio y consumo. El análisis de ambas teorías permite empoderar a los sujetos que tradicionalmente permanecen alejados de las decisiones financieras, y su interconexión desde el punto de vista epistemológico permite la creación de un poderoso instrumento de formulación popular de políticas dirigidas a democratizar los procesos económicos, junto con los mecanismos estatales y administrativos reguladores de la materia.
Ulianova Halyna, N. Baadzhy, Oleksii Podoliev
et al.
The article is devoted to the main issues of protection of intellectual property rights in the field of television and the internet, related to the spread of piracy in the field of copyright and related rights, and to the unlicensed copying of television broadcasts. Moreover, there is an emphasis on the exacerbation of existing problems in the context of the Covid-19 pandemic and how this affected the industry. This research considers international and national legislation in the field of intellectual law, international experience of various countries, approaches to theory, and problems of implementing existing measures, in order to propose some options for optimizing existing mechanisms. The research methodology use the following methods: formal-legal, historical-legal, comparative analysis, and modeling. The main issues under consideration are the following ones: international broadcasting regulation, the problem of uniform terminology, and prospects for the legal regulation of copyright in television broadcasting. The authors defend the uncompromising protection of intellectual property, highlighting the lack of basic definitions, to propose their own definitions, in order to avoid the weak copyright protection of television broadcasting organizations.
Author explains legal regulation of OTC financial derivative trading on the leading financial markets (USA and EU) as well as shows uniform regulations developed in international legal environment, and separately explains legal framework of the said question in positive Serbian law. Author elaborates main current legal issues related to financial derivatives transactions on the OTC market to which domestic participants are exposed during the operations in Serbian territory but also in cross-border operations. Finally, the author provides concrete proposals for further improvement of disputable legal issues by amending the regulatory framework in line with comparative legal regulations and regulations developed by the international community. Purpose of this article is to bring the attention of legal experts in Serbia to certain inefficient solutions in currently applicable legal regulations related to financial derivatives on the OTC Market, as well as to serve to legal practice as guidance for practical solving the disputable legal issues in particular transactions which have become frequent also for domestic participants on the capital market.
В статье изучены национальные и международные правовые основы регулирования отношений в сфере физической культуры и спорта. Установлено, что изучение и учет положительного зарубежного опыта эффективного регулирования отношений, возникающих в сфере физической культуры и спорта, важны для совершенствования норм национального спортивного права, в том числедля проведения кодификации спортивного законодательства России, и выступает одной из важныхпричин, обусловливающих развитие международного сотрудничества Российской Федерации с зарубежными странами. Другой важной причиной выступает необходимость проведения гармонизации и унификации национального законодательства России в области физической культуры и спортас нормами международного права. Развитие международного сотрудничества России с зарубежнымистранами и международными организациями в направлении обеспечения национальной безопасности особенно актуально в условиях осуществления давления на российских спортсменов в последнеедесятилетие на спортивных соревнованиях и мероприятиях различного уровня. Сделан вывод о необходимости для России развивать все направления международного сотрудничества, так как физическая культура и спорт на национальном и международном уровнях выступает важным инструментомобеспечения устойчивого социально-экономического развития стран, инструментом личностногоразвития человека, инструментом, обеспечивающим межкультурное, партнерское и дружественноеразвитие межгосударственного общения и служит мощным стимулом повышения конкурентоспособности каждой страны в условиях мировой глобализации.
Comparative law. International uniform law, Jurisprudence. Philosophy and theory of law
Article 30 paragraph (1) of Law No. 38/2014 letter j explains that nurses are authorized to administer drug administration to clients, but the facts on the field nurses are actually arrested by Police for providing pharmaceutical preparations for clients. This shows that there has been an imbalance between regulations and facts on the ground.
The problem in this study is how the nurse's authority in the service of giving red label medicines in the practice of independent nursing and how the legal protection of nurses in the practice of independent nursing
This research method uses a normative juridical approach, with secondary data collection, to prove whether it is true that nurses are prohibited from giving red label drugs. The data obtained were analyzed qualitatively.
Based on the results of the study found that nurses have the authority to administer all drugs including red labeled drugs except drugs that contain narcotics and psychotronics. Nurses can provide these drugs both in terms of limitations and not. In that case, nurses obtain preventive legal protection by carrying out their obligations as nurses and fulfilling the rights of patients and not committing unlawful acts.
Rodrigo H. Álvarez-Gutiérrez, Amelia M. Stutz, Chi Y. Law
et al.
We analyze the gas mass distribution, the gas kinematics, and the young stellar object (YSO) content of the California Molecular Cloud (CMC) L1482 filament. We derive a Gaia DR2 YSO distance of 511$^{+17}_{-16}$ pc. We derive scale-free power-laws for the mean gas line-mass (M/L) profiles; we calculate the gravitational potential and field profiles consistent with these. We present IRAM 30 m C$^{18}$O (1-0) (and other tracers) position-velocity (PV) diagrams that exhibit complex velocity twisting and turning structures. We find a rotational profile in C$^{18}$O perpendicular to the southern filament ridgeline. The profile is regular, confined ($r\lesssim0.4$ pc), anti-symmetric, and to first order linear with a break at $r\sim0.25$ pc. The timescales of the inner (outer) gradients are $\sim$0.7 (6.0) Myr. We show that the centripetal force, compared to gravity, increases toward the break; when the ratio of forces approaches unity, the profile turns over, just before filament breakup is achieved. The timescales and relative roles of gravity to rotation indicate that the structure is stable, long lived ($\sim$ a few times 6 Myr), and undergoing outside-in evolution. Moreover, this filament has practically no star formation, a perpendicular Planck plane-of-the-sky (POS) magnetic field morphology, and POS "zig-zag" morphology, which together with the rotation profile lead to the suggestion that the 3D shape is a corkscrew filament with a helical magnetic field. These results, combined with results in Orion and G035.39-00.33, suggest evolution toward higher densities as rotating filaments shed angular momentum. Thus, magnetic fields may be an essential feature of high-mass (M $\sim10^5$ M$_{\odot}$) cloud filament evolution toward cluster formation.
We consider the non-linear classical field theory which results from adding to the Maxwell's Lagrangian the contributions from the weak-field Euler-Heisenberg Lagrangian and a non-uniform part which involves derivatives of the electric and magnetic fields. We focus on the electrostatic case where the magnetic field is set to zero, and we derive the modified Gauss law, resulting in a higher order differential equation. This equation gives the electric field produced by stationary charges in the higher order non-linear electrodynamics. Specializing for the case of a point charge, we investigate the solutions of the modified Gauss law and calculate the correction to the Coulomb law.
The comparative work gives a comprehensive overview of the obligations of the passenger carrier in the context of delays, denied boarding and overbooking for carriage by air, rail, ship, bus and coach. It contains a detailed analysis and comparison of French, German, European and international uniform law. After a detailed presentation of the legal sources and principles of the passenger transport contract, the liability standards and legal remedies for typical transport disruptions in form of delay, denied boarding and over-booking are examined. The differences and similarities are compared comprehensively. In particular, the typical causes of disturbances in form of strikes, meteorological conditions and technical defects are examined. The methodological basis is Watson‘s model of legal transplants.