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We describe the construction of a database of extremely metal-poor (EMP) stars in the Galactic halo whose elemental abundances have been determined. Our database contains detailed elemental abundances, reported equivalent widths, atmospheric parameters, photometry, and binarity status, compiled from papers in the recen... | Samanyolu halesindeki [Fe/H] < -2,5 olan aşırı metal-fakir (EMP) yıldızların element bolluklarının belirlendiği bir veri tabanının oluşturulmasını tanımlıyoruz. Bu veri tabanımız, son literatürde [Fe/H] < -2,5 olan EMP hale yıldızlarını inceleyen çalışmalardan derlenmiş, ayrıntılı element bolluklarını, bildirilen eşdeğ... | tr |
We present optical photopolarimetric observations of the BL Lac object S4 0954+658 obtained with the 70-cm telescope in Crimea, 40-cm telescope in St.Petersburg, and 1.8-m Perkins telescope at Lowell Observatory (Flagstaff, Az). After a faint state with a brightness level R ~17.6 mag registered in the first half of Jan... | Presentiamo osservazioni fotopolarimetriche ottiche dell'oggetto BL Lac S4 0954+658 ottenute con il telescopio da 70 cm in Crimea, il telescopio da 40 cm a San Pietroburgo e il telescopio Perkins da 1,8 m all'Osservatorio Lowell (Flagstaff, Arizona). Dopo una fase debole con un livello di luminosità R ~17,6 mag registr... | it |
Among the combinations $L_e-L_\mu$, $L_e-L_\tau$ and $L_\mu-L_\tau$ any one can be gauged in anomaly free way with the standard model gauge group. The masses of these gauge bosons can be so light that it can induce long-range forces on the Earth due to the electrons in the Sun. This type of forces can be constrained si... | Entre las combinaciones $L_e-L_\mu$, $L_e-L_\tau$ y $L_\mu-L_\tau$, cualquiera puede ser incorporada como simetría de calibración de manera libre de anomalías junto con el grupo de calibración del modelo estándar. Las masas de estos bosones de calibración pueden ser tan pequeñas que podrían inducir fuerzas de largo alc... | es |
We establish quantitative properties of minimizers and stable sets for nonlocal interaction functionals, including the $s$-fractional perimeter as a particular case. On the one hand, we establish universal $BV$-estimates in every dimension $n\ge 2$ for stable sets. Namely, we prove that any stable set in $B_1$ has fi... | Kami menetapkan sifat-sifat kuantitatif bagi pengoptimum dan set stabil untuk fungsian interaksi tak setempat, termasuk perimeter pecahan-$s$ sebagai kes khusus. Di satu pihak, kami menetapkan anggaran $BV$ sejagat dalam setiap dimensi $n\ge 2$ bagi set stabil. Secara khusus, kami membuktikan bahawa mana-mana set stabi... | ms |
High-contrast coronagraphy will be needed to image and characterize faint extra-solar planetary systems. Coronagraphy is a rapidly evolving field, and many enhanced alternatives to the classical Lyot coronagraph have been proposed in the past ten years. Here, we discuss the operation of the vector vortex coronagraph, w... | 高コントラストコロナグラフィーは、微弱な太陽系外惑星系の撮像と特性評価に必要とされる。コロナグラフィーは急速に進化する分野であり、過去10年間に古典的なリヨット式コロナグラフの強化型として多くの代替手法が提案されてきた。ここでは、可能な限り最も効率的なコロナグラフの一つであるベクトル渦巻きコロナグラフの動作について議論する。まず最近の実験室での結果を示し、その後パロマー天文台での初観測結果を紹介する。我々の近赤外Hバンド（中心波長約1.65マイクロメートル）およびKバンド（中心波長約2.2マイクロメートル）用ベクトル渦巻きデバイスは、実験室で3λ/Dの角距離において約1×10⁻⁶という優れたコントラスト性能を示した。天体観測では、K... | ja |
We study the signals for supersymmetry at the Tevatron and DiTevatron ($\sqrt{s}=4\TeV$) in various well-motivated supersymmetric models. We consider the trilepton signature in the decay of pair-produced charginos and neutralinos, the missing energy signature in gluino and squark production, and the $b\bar b$ signal in... | Wir untersuchen die Signale für Supersymmetrie am Tevatron und am DiTevatron ($\sqrt{s}=4\TeV$) in verschiedenen gut motivierten supersymmetrischen Modellen. Wir betrachten die Drei-Lepton-Signatur im Zerfall von paarweise erzeugten Charginos und Neutralinos, die Signatur mit fehlender Energie bei der Produktion von Gl... | de |
I review recent numerical and analytical work on the feedback from both low- and high-mass cluster stars into their gasoeus environment. The main conclusions are that i) outflow driving appears capable of maintaing the turbulence in parsec-sized clumps and retarding their collapse from the free-fall rate, although ther... | Ich überprüfe aktuelle numerische und analytische Arbeiten zur Rückkopplung sowohl von sternarmen als auch sternreichen Haufensternen in ihre gasförmige Umgebung. Die wichtigsten Schlussfolgerungen sind: i) Die durch Ausflüsse verursachte Bewegung erscheint in der Lage, die Turbulenz in parsec-großen Klumpen aufrechtzu... | de |
With COVID-19 affecting every country globally and changing everyday life, the ability to forecast the spread of the disease is more important than any previous epidemic. The conventional methods of disease-spread modeling, compartmental models, are based on the assumption of spatiotemporal homogeneity of the spread of... | Con la COVID-19 afectando a todos los países del mundo y transformando la vida cotidiana, la capacidad de predecir la propagación de la enfermedad es más importante que en cualquier otra epidemia anterior. Los métodos convencionales de modelado de la propagación de enfermedades, los modelos compartimentales, se basan e... | es |
Foreseeing the era of high spatial resolution measurements of the Sunyaev-Zel'dovich effect (SZE) in clusters of galaxies, we present a prototype analysis of this sort combined with Chandra X-ray data. It is applied specifically to RX J1347-1145 at z=0.451, the most X-ray-luminous galaxy cluster known, for which the hi... | Güneş-Zel'dovich etkisinin (SZE) yüksek uzamsal çözünürlüklü ölçümlerinin galaksi kümelerindeki çağının önceden görülmesiyle, Chandra X-ışını verileriyle birleştirilmiş bu tür bir analizin bir örnek çalışmasını sunuyoruz. Bu yöntem özellikle z=0,451'deki RX J1347-1145'e uygulanmıştır ve şu anda en yüksek çözünürlüklü S... | tr |
The gaussian damping factor (g.d.f.) and the new interaction vertex with the symplectic tensor are the characteristic properties of the N-point scalar-vector scattering amplitudes of the p-p' (p < p') open string system which realizes noncommutative geometry. The g.d.f. is here interpreted as a form factor of the Dp-br... | Hệ số tắt dần Gauss (g.d.f.) và đỉnh tương tác mới với ten-xơ đối xứng là những tính chất đặc trưng của các biên độ tán xạ vô hướng - vectơ N điểm trong hệ dây mở p-p' (p < p') thực hiện hình học không giao hoán. Hệ số tắt dần Gauss ở đây được diễn giải như một nhân tử dạng của Dp-brane do dòng U(1) không giao hoán gây... | vi |
The generalized belief propagation (GBP), introduced by Yedidia et al., is an extension of the belief propagation (BP) algorithm, which is widely used in different problems involved in calculating exact or approximate marginals of probability distributions. In many problems, it has been observed that the accuracy of GB... | La propagazione generalizzata delle credenze (GBP), introdotta da Yedidia et al., è un'estensione dell'algoritmo di propagazione delle credenze (BP), ampiamente utilizzato in diversi problemi riguardanti il calcolo esatto o approssimato delle marginali di distribuzioni di probabilità. In molti problemi si è osservato c... | it |
Robots which interact with the physical world will benefit from a fine-grained tactile understanding of objects and surfaces. Additionally, for certain tasks, robots may need to know the haptic properties of an object before touching it. To enable better tactile understanding for robots, we propose a method of classify... | Роботы, взаимодействующие с физическим миром, выиграют от детального тактильного понимания объектов и поверхностей. Кроме того, для выполнения определённых задач роботам может потребоваться знать тактильные свойства объекта ещё до его прикосновения. Чтобы улучшить тактильное восприятие для роботов, мы предлагаем метод ... | ru |
Charginos $\tilde{\chi}^\pm$ and neutralinos $\tilde{\chi}^0$ in supersymmetric theories can be produced copiously at $e^+e^-$ colliders and their properties can be measured with high accuracy. Consecutively to the chargino system, in which the SU(2) gaugino parameter $M_2$, the higgsino mass parameter $\mu$ and $\tan\... | يمكن إنتاج الشحنينو $\tilde{\chi}^\pm$ والنيوترينو $\tilde{\chi}^0$ في النظريات الفائقة التناظر بكثافة في مصادمات $e^+e^-$، ويمكن قياس خصائصها بدقة عالية. وبعد تحليل نظام الشحنينو، الذي يمكن من خلاله تحديد معلمة الغاوجينو SU(2) $M_2$ ومعلمة كتلة الهيغسينو $\mu$ و$\tan\beta$، يمكن تحليل المعلمة الأساسية المتبقية في قطاع... | ar |
We consider an unmanned aerial vehicle enabled (UAV-enabled) fog-radio access network (F-RAN) in which UAVs are considered as flying remote radio heads (RRH) equipped with caching and cooperative communications capabilities. We are mainly focus on probabilistic/randomized content placement strategy, and accordingly for... | Consideriamo una rete di accesso radio basata su fog (F-RAN) abilitata da veicoli aerei senza pilota (UAV-enabled), in cui gli UAV sono considerati testine radio remote (RRH) volanti dotate di capacità di caching e comunicazioni cooperative. Ci concentriamo principalmente su una strategia di posizionamento dei contenut... | it |
The deep reinforcement learning method usually requires a large number of training images and executing actions to obtain sufficient results. When it is extended a real-task in the real environment with an actual robot, the method will be required more training images due to complexities or noises of the input images, ... | O método de aprendizado por reforço profundo geralmente exige um grande número de imagens de treinamento e a execução de muitas ações para obter resultados suficientes. Quando é estendido a uma tarefa real no ambiente real com um robô físico, o método exigirá ainda mais imagens de treinamento devido às complexidades ou... | pt |
The deep reinforcement learning method usually requires a large number of training images and executing actions to obtain sufficient results. When it is extended a real-task in the real environment with an actual robot, the method will be required more training images due to complexities or noises of the input images, ... | 딥 강화 학습 방법은 일반적으로 충분한 결과를 얻기 위해 많은 수의 훈련 이미지와 실행 동작이 필요하다. 실제 환경에서 실제 로봇을 이용하여 실제 작업으로 확장할 경우, 입력 이미지의 복잡성이나 노이즈로 인해 더 많은 훈련 이미지가 요구되며, 실제 로봇에서 많은 동작을 수행하는 것도 심각한 문제가 된다. 따라서 훈련 시행 횟수를 줄이기 위해 생성 모델을 적용하여 네트워크를 초기화하는 확장된 딥 강화 학습 방법을 제안한다. 본 논문에서는 딥 강화 학습 방법으로 딥 Q-네트워크 방법을, 생성 모델로는 딥 오토인코더를 사용하였다. 카트-폴 게임, 아타리 게임, 실제 로봇을... | ko |
To deploy a well-trained CNN model on low-end computation edge devices, it is usually supposed to compress or prune the model under certain computation budget (e.g., FLOPs). Current filter pruning methods mainly leverage feature maps to generate important scores for filters and prune those with smaller scores, which ig... | لنشر نموذج شبكة عصبية تلافيفية مُدرَّب جيدًا على أجهزة حواف ذات قدرة حسابية منخفضة، يُفترض عادةً ضغط النموذج أو تقليصه ضمن ميزانية حسابية معينة (مثل العمليات الحسابية FLOPs). تعتمد طرق التقليم الحالية للمرشحات بشكل رئيسي على خرائط الميزات لتوليد درجات أهمية للمرشحات وتقليص تلك التي تمتلك درجات أقل، مما يتجاهل تباين دفع... | ar |
The oversampling multiscale finite element method (MsFEM) is one of the most popular methods for simulating composite materials and flows in porous media which may have many scales. But the method may be inapplicable or inefficient in some portions of the computational domain, e.g., near the domain boundary or near lon... | Die Oversampling-Multiskalen-Finite-Elemente-Methode (MsFEM) ist eine der populärsten Methoden zur Simulation von Verbundwerkstoffen und Strömungen in porösen Medien, die viele Skalen aufweisen können. Doch die Methode kann in einigen Bereichen des Rechengebiets nicht anwendbar oder ineffizient sein, beispielsweise in ... | de |
We study effects of pinning on the dynamics of a vortex lattice in a type II superconductor in the strong-pinning situation and determine the force--velocity (or current--voltage) characteristic combining analytical and numerical methods. Our analysis deals with a small density $n_p$ of defects that act with a large fo... | 我们研究了在强钉扎情况下，钉扎效应对II型超导体中涡旋晶格动力学的影响，并结合解析与数值方法确定了力-速度（或电流-电压）特性。我们的分析针对缺陷密度 $n_p$ 较小的情形，这些缺陷对涡旋施加较大的力 $f_p$，从而诱导出强钉扎理论的典型特征——双稳态构型。我们确定了速度相关的平均钉扎力密度 $\langle F_p(v)\rangle$，发现其变化发生在速度尺度 $v_p \sim f_p/\eta a_0^3$ 上，其中 $\eta$ 是涡旋运动的粘滞系数，$a_0$ 是涡旋之间的间距。在钉扎密度极小的极限下，该速度远大于自由涡旋系统在接近临界力密度 $F_c = \langle F_p(v=0)\rangle \propt... | zh |
The light emission rate of a single quantum dot can be drastically enhanced by embedding it in a resonant semiconductor microcavity. This phenomenon is known as the Purcell effect, and the coupling strength between emitter and cavity can be quantified by the Purcell factor. The most natural way for probing the Purcell ... | A taxa de emissão de luz de um único ponto quântico pode ser drasticamente aumentada ao incorporá-lo em uma microcavidade semicondutora ressonante. Esse fenômeno é conhecido como efeito Purcell, e a intensidade do acoplamento entre o emissor e a cavidade pode ser quantificada pelo fator Purcell. A forma mais natural de... | pt |
Semi-competing risks refer to the setting where primary scientific interest lies in estimation and inference with respect to a non-terminal event, the occurrence of which is subject to a terminal event. In this paper, we present the R package SemiCompRisks that provides functions to perform the analysis of independent/... | 세미-경쟁 위험(semi-competing risks)이란 주된 과학적 관심이 종말 사건(terminal event)의 영향을 받을 수 있는 비종말 사건(non-terminal event)에 관한 추정 및 추론에 있는 상황을 의미한다. 본 논문에서는 질병-사망 다중 상태 모델(illness-death multi-state model) 하에서 독립적/군집화된 semi-competing risks 자료를 분석할 수 있는 R 패키지 SemiCompRisks를 소개한다. 본 패키지는 사용자가 모형 구성요소에 대해 다양한 선택지 중에서 사양을 선택할 수 있도록 하여 상당한 유... | ko |
En este trabajo, se obtiene una expresi\'on num\'erica para calcular el espectro de emisi\'on de un sistema microcavidad-punto cu\'antico usando una teor\'ia de campo medio en el formalismo de la matriz densidad. El sistema modelado es un micropilar semiconductor que contiene un \'unico punto cu\'antico en el interior ... | ในงานวิจัยนี้ เราได้หาสมการเชิงตัวเลขเพื่อคำนวณสเปกตรัมการปล่อยรังสีของระบบไมโครเคฟิตี้-ควอนตัมดอท โดยใช้ทฤษฎีสนามเฉลี่ยในรูปแบบของเมทริกซ์ความหนาแน่น ระบบที่นำมาจำลองเป็นไมโครพิลเลอร์กึ่งตัวนำที่มีควอนตัมดอทเพียงหนึ่งเดียวอยู่ภายในไมโครเคฟิตี้ ซึ่งระบบนี้มีการสูญเสียโฟตอนผ่านกระจกของเคฟิตี้และการปั๊มเอกซิโทนเข้าสู่ควอ... | th |
We study the signals for supersymmetry at the Tevatron and DiTevatron ($\sqrt{s}=4\TeV$) in various well-motivated supersymmetric models. We consider the trilepton signature in the decay of pair-produced charginos and neutralinos, the missing energy signature in gluino and squark production, and the $b\bar b$ signal in... | نقوم بدراسة إشارات التناظر الفائق عند مصادم تيفاترون وديتيفاترون ($\sqrt{s}=4\TeV$) في عدة نماذج تناظر فائق مُبرَّرة جيدًا. ننظر في توقيع الثلاثة ليبتونات الناتجة عن تحلل الشارجينوات والنيوترينوات المنتجة بشكل زوجي، وتوقيع الطاقة المفقودة الناتجة عن إنتاج الغليونات والكواركات الفائقة، وإشارة $b\bar b$ الناتجة عن تحلل أ... | ar |
In 1978, Schaefer proved his famous dichotomy theorem for generalized satisfiability problems. He defined an infinite number of propositional satisfiability problems, showed that all these problems are either in P or NP-complete, and gave a simple criterion to determine which of the two cases holds. This result is surp... | В 1978 году Шефер доказал свою знаменитую теорему о раздвоении для обобщённых задач выполнимости. Он определил бесконечное число задач выполнимости высказываний, показал, что все эти задачи либо принадлежат классу P, либо являются NP-полными, и привёл простой критерий для определения того, имеет ли место один из этих д... | ru |
Data on the photoproduction of $\omega$ mesons on nuclei have been re-analyzed in a search for in-medium modifications. The data were taken with the Crystal Barrel(CB)/TAPS detector system at the ELSA accelerator facility in Bonn. First results from the analysis of the data set were published by D. Trnka et al. in Phys... | Se ha realizado un nuevo análisis de datos sobre la fotoproducción de mesones $\omega$ en núcleos en busca de modificaciones en medio material. Los datos fueron obtenidos con el sistema detector Crystal Barrel (CB)/TAPS en la instalación aceleradora ELSA en Bonn. Los primeros resultados del análisis de este conjunto de... | es |
The evolution of a walker in standard "Discrete-time Quantum Walk (DTQW)" is determined by coin and shift unitary operators. The conditional shift operator shifts the position of the walker to right or left by unit step size while the direction of motion is specified by the coin operator. This scenario can be generaliz... | Standart "Ayrık Zamanlı Kuantum Yürüyüşü (DTQW)" içinde bir yürüyüşcünün evrimi, para ve kaydırma birim operatörleri tarafından belirlenir. Koşullu kaydırma operatörü, yürüyüşcünün konumunu birim adım büyüklüğünde sağa veya sola kaydırırken, hareket yönü para operatörü tarafından belirlenir. Bu senaryo, her adımda beli... | tr |
We propose Otiy, a node-centric location service that limits the impact of location updates generate by mobile nodes in IEEE802.11-based wireless mesh networks. Existing location services use node identifiers to determine the locator (aka anchor) that is responsible for keeping track of a node's location. Such a strate... | Мы предлагаем Otiy — ориентированную на узлы службу определения местоположения, ограничивающую влияние обновлений местоположения, генерируемых мобильными узлами в беспроводных сетях-мешах на основе IEEE802.11. Существующие службы определения местоположения используют идентификаторы узлов для определения локатора (также... | ru |
Transportation systems often rely on understanding the flow of vehicles or pedestrian. From traffic monitoring at the city scale, to commuters in train terminals, recent progress in sensing technology make it possible to use cameras to better understand the demand, i.e., better track moving agents (e.g., vehicles and p... | 交通系统通常依赖于对车辆或行人流动情况的理解。从城市尺度的交通监控，到火车站内通勤者的流动，传感技术的最新进展使得利用摄像头更深入地了解需求成为可能，即更准确地追踪移动个体（如车辆和行人）。无论摄像头安装在无人机、车辆上，还是固定于建成环境中，它们的分布不可避免地较为分散。因此，我们需要开发能够在非重叠视野下捕捉的图像之间重新识别同一目标个体的技术，这一任务被称为视觉重识别。目前最先进的方法采用基于交叉熵损失函数训练的神经网络表征学习。我们认为，这种损失函数并不适用于视觉重识别任务，因此提出在表征学习框架中建模置信度。我们通过三种方法展示了基于置信度的学习框架的影响：标签平滑、置信度惩罚以及深度变分信息瓶颈。这些方法均表现出性能提升... | zh |
The light emission rate of a single quantum dot can be drastically enhanced by embedding it in a resonant semiconductor microcavity. This phenomenon is known as the Purcell effect, and the coupling strength between emitter and cavity can be quantified by the Purcell factor. The most natural way for probing the Purcell ... | Emisní rychlost jediného kvantového bodu může být výrazně zvýšena jeho umístěním do rezonanční polovodičové mikrorezonátorové dutiny. Tento jev je známý jako Purcellův efekt a síla vazby mezi emitorem a dutinou může být kvantifikována pomocí Purcellova faktoru. Nejpřirozenějším způsobem, jak Purcellův efekt zkoumat, je... | cs |
We investigate the propagation of locally plane, small-amplitude, monochromatic gravitational waves through cold compressible interstellar gas in order to provide a more accurate picture of expected waveforms for direct detection. The quasi-isothermal gas is concentrated in a spherical symmetric cloud held together by ... | نقوم بدراسة انتشار الموجات الجاذبية المستوية موضعياً، ذات السعة الصغيرة، والوحيدة التردد من خلال غاز فضائي بارد قابل للانضغاط، بهدف تقديم صورة أكثر دقة للأشكال الموجية المتوقعة في الكشف المباشر. يتم تركيز الغاز شبه المتماسك الحراري في سحابة كروية متماثلة تربطها قوة الجاذبية الذاتية. يمكن معاملة الموجات الجاذبية كاضطراب... | ar |
We present optical photopolarimetric observations of the BL Lac object S4 0954+658 obtained with the 70-cm telescope in Crimea, 40-cm telescope in St.Petersburg, and 1.8-m Perkins telescope at Lowell Observatory (Flagstaff, Az). After a faint state with a brightness level R ~17.6 mag registered in the first half of Jan... | Kırım'daki 70 cm'lik teleskop, St. Petersburg'deki 40 cm'lik teleskop ve Lowell Gözlemevi'ndeki (Flagstaff, Az) 1.8 m'lik Perkins teleskobu kullanılarak elde edilen BL Lac nesnesi S4 0954+658'in optik fotopolarimetrik gözlemlerini sunuyoruz. Ocak 2011'in ilk yarısında R ~17,6 mag parlaklık seviyesinde kaydedilen sönük ... | tr |
Let ${\widetilde {\mathcal O}}(\mathbf B)$ be the category of (open) subcategories of a topological groupoid ${\mathbf B}.$ This paper concerns with the ${\mathbf {Cat}}$-valued sheaves over category ${\widetilde {\mathcal O}}(\mathbf B).$ Since ${\mathbf {Cat}}$ is not a concrete category, traditional definition of pr... | ${\mathbf B}$를 위상 군족(topological groupoid)이라 하고, ${\widetilde {\mathcal O}}(\mathbf B)$를 ${\mathbf B}$의 (열린) 부분범주들로 구성된 범주라 하자. 본 논문은 범주 ${\widetilde {\mathcal O}}(\mathbf B)$ 위에서 정의된 ${\mathbf {Cat}}$ 값을 갖는 층(sheaf)에 관해 다룬다. ${\mathbf {Cat}}$이 구체적 범주(concrete category)가 아니기 때문에, 전통적인 준층(presheaf)의 정의로는 이러한 상황을 다룰 수 없다... | ko |
The Lorentz gas is a billiard model involving a point particle diffusing deterministically in a periodic array of convex scatterers. In the two dimensional finite horizon case, in which all trajectories involve collisions with the scatterers, displacements scaled by the usual diffusive factor $\sqrt{t}$ are normally di... | Lorentzův plyn je model billardu, ve kterém se bodová částice deterministicky difunduje v periodické mřížce konvexních rozptylovačů. V dvourozměrném případě s konečným horizontem, kdy všechny trajektorie zahrnují srážky s rozptylovači, jsou posuny škálované obvyklým difuzním faktorem $\sqrt{t}$ normálně rozděleny, jak ... | cs |
We study theoretically the low-energy hole states in Si, Ge, and Ge/Si core/shell nanowires (NWs). The NW core in our model has a rectangular cross section, the results for a square cross section are presented in detail. In the case of Ge and Ge/Si core/shell NWs, we obtain very good agreement with previous theoretical... | Chúng tôi nghiên cứu lý thuyết các trạng thái lỗ trống ở vùng năng lượng thấp trong các dây nano (NWs) Si, Ge và dây nano lõi/vỏ Ge/Si. Lõi dây nano trong mô hình của chúng tôi có tiết diện hình chữ nhật, các kết quả đối với tiết diện hình vuông được trình bày chi tiết. Trong trường hợp các dây nano Ge và dây nano lõi/... | vi |
We use the Kubo-Landauer formalism to compute the longitudinal (two-terminal) conductance of a two dimensional electron system placed in a strong perpendicular magnetic field, and subjected to periodic modulations and/or disorder potentials. The scattering problem is recast as a set of inhomogeneous, coupled linear equ... | Мы используем формализм Кубо-Ландауэра для вычисления продольной (двухконтактной) проводимости двумерной электронной системы, помещённой в сильное перпендикулярное магнитное поле и подвергнутой периодическим модуляциям и/или беспорядочным потенциалам. Задача рассеяния переформулируется в виде системы неоднородных связа... | ru |
Permutation entropy techniques can be useful in identifying anomalies in paleoclimate data records, including noise, outliers, and post-processing issues. We demonstrate this using weighted and unweighted permutation entropy of water-isotope records in a deep polar ice core. In one region of these isotope records, our ... | Các kỹ thuật về độ đo hỗn loạn hoán vị có thể hữu ích trong việc xác định các điểm bất thường trong các bản ghi dữ liệu khí hậu thời cổ đại, bao gồm nhiễu, các điểm ngoại lai và các vấn đề liên quan đến xử lý dữ liệu sau quá trình thu thập. Chúng tôi minh chứng điều này bằng cách sử dụng độ đo hỗn loạn hoán vị có trọng... | vi |
The Fredholm determinants of a special class of integral operators K supported on the union of m curve segments in the complex plane are shown to be the tau-functions of an isomonodromic family of meromorphic covariant derivative operators D_l. These have regular singular points at the 2m endpoints of the curve segment... | 複素平面内のm個の曲線分の和集合上で定義されたある特別なクラスの積分作用素Kのフレドホルム行列式が、正則特異点を2m個の曲線分の端点に持ち、無限遠点においてポンカレ指数1の特異点を持つ有理型共変微分作用素D_lの等モノドロミー族のタウ関数であることが示される。これら作用素が作用するリーマン球面上のベクトル束の階数rは、積分核の分子に現れる指数和に含まれる異なる項の数に等しい。変形方程式は、補助的なシンプレクティックベクトル空間M上の非自励ハミルトン系と見なすことができる。この空間Mの、パラメータ付きのハミルトン群作用によるポアソン商は、有理R行列構造に関するループ代数Lgl_R(r)のポアソン部分多様体と同一視される。行列リーマン・... | ja |
Among the combinations $L_e-L_\mu$, $L_e-L_\tau$ and $L_\mu-L_\tau$ any one can be gauged in anomaly free way with the standard model gauge group. The masses of these gauge bosons can be so light that it can induce long-range forces on the Earth due to the electrons in the Sun. This type of forces can be constrained si... | Antara kombinasi $L_e-L_\mu$, $L_e-L_\tau$ dan $L_\mu-L_\tau$, mana-mana satu boleh ditindakkan secara bebas anomali dengan kumpulan penggauge model piawai. Jisim penggauge boson ini boleh menjadi begitu ringan sehingga ia boleh menghasilkan daya jarak jauh di Bumi akibat elektron-elektron dari Matahari. Jenis daya sed... | ms |
We study effects of pinning on the dynamics of a vortex lattice in a type II superconductor in the strong-pinning situation and determine the force--velocity (or current--voltage) characteristic combining analytical and numerical methods. Our analysis deals with a small density $n_p$ of defects that act with a large fo... | Kami mengkaji kesan pengekangan terhadap dinamik kekisi vorteks dalam konduktor super jenis II dalam situasi pengekangan kuat dan menentukan ciri daya--halaju (atau arus--voltan) dengan menggabungkan kaedah analitikal dan berangka. Analisis kami melibatkan ketumpatan kecil $n_p$ bagi cacat yang bertindak dengan daya be... | ms |
Self-supervised methods play an increasingly important role in monocular depth estimation due to their great potential and low annotation cost. To close the gap with supervised methods, recent works take advantage of extra constraints, e.g., semantic segmentation. However, these methods will inevitably increase the bur... | تُعد الأساليب المعتمدة على التعلم الذاتي غير المراقب تلعب دورًا متزايد الأهمية في تقدير العمق باستخدام كاميرا واحدة نظرًا لإمكاناتها الكبيرة وانخفاض تكلفة الترميز. ولسد الفجوة مع الأساليب الخاضعة للإشراف، تستفيد الأبحاث الحديثة من قيود إضافية، مثل تجزئة المعاني. ومع ذلك، فإن هذه الأساليب تزيد بالضرورة من عبء النموذج. ف... | ar |
We study the Wouthuysen-Field coupling at early universe with numerical solutions of the integrodifferential equation describing the kinetics of photons undergoing resonant scattering. The numerical solver is developed based on the weighted essentially non-oscillatory (WENO) scheme for the Boltzmann-like integrodiffere... | Nous étudions le couplage de Wouthuysen-Field à l'univers primordial au moyen de solutions numériques de l'équation intégro-différentielle décrivant la cinétique des photons subissant une diffusion résonnante. Le solveur numérique est développé à partir du schéma essentiellement non oscillatoire pondéré (WENO) appliqué... | fr |
The gaussian damping factor (g.d.f.) and the new interaction vertex with the symplectic tensor are the characteristic properties of the N-point scalar-vector scattering amplitudes of the p-p' (p < p') open string system which realizes noncommutative geometry. The g.d.f. is here interpreted as a form factor of the Dp-br... | 高斯阻尼因子（g.d.f.）以及带有辛张量的新相互作用顶点，是实现非对易几何的 p-p'（p < p'）开弦系统中 N 点标量-矢量散射振幅的特征性质。此处将 g.d.f. 解释为非对易 U(1) 流作用下 Dp-膜的形状因子。通过观察发现，g.d.f. 实际上等于 Gopakumar、Minwalla 和 Strominger 所引入的非对易投影子孤子的傅里叶变换，因此我们进一步将零斜率极限下的 Dp-膜等同于非对易孤子态。结果表明，在零斜率极限下，g.d.f. 仅依赖于 N-2 个入射/出射光子的总动量。在先前提出的低能有效作用量（LEEA）描述中，这一结果源于孤子扇区中 δ 函数形式的传播子，以及标量场 Φ(x^μ, x^m)... | zh |
The emerging new paradigm of technologies, the internet of things, entails a process of device miniaturization to combine several functional components, such as sensors, actuators, and powering elements, in a single individual on-chip platform. An essential requirement is for the devices to have a small footprint and t... | النموذج التكنولوجي الجديد الناشئ، إنترنت الأشياء، يستلزم عملية تقليل حجم الأجهزة لدمج مكونات وظيفية متعددة، مثل الحساسات والمشغلات وعناصر التغذية الكهربائية، في منصة متكاملة واحدة على رقاقة واحدة. ويتمثل أحد المتطلبات الأساسية في أن تكون الأجهزة ذات مساحة صغيرة وبالتالي يتم توسيعها عبر الأبعاد الثلاثة لتقديم أداء كافٍ.... | ar |
The Lorentz gas is a billiard model involving a point particle diffusing deterministically in a periodic array of convex scatterers. In the two dimensional finite horizon case, in which all trajectories involve collisions with the scatterers, displacements scaled by the usual diffusive factor $\sqrt{t}$ are normally di... | Gas Lorentz adalah model biji yang melibatkan zarah titik yang merebak secara menentu dalam susunan berkala penghambur cembung. Dalam kes dua dimensi dengan ufuk terhingga, di mana semua lintasan melibatkan perlanggaran dengan penghambur, sesaran yang diskalakan dengan faktor resapan biasa $\sqrt{t}$ diedarkan secara n... | ms |
Within the framework of classical field theory, the connection between the Dirac field as the field of matter and the spacetime metric is discussed. Polarization structure of the Dirac field is shown to be rich enough to determine the spacetime metric locally and to explain the emergence of observed matter as localized... | Dentro del marco de la teoría clásica de campos, se analiza la conexión entre el campo de Dirac como campo de materia y la métrica del espacio-tiempo. Se muestra que la estructura de polarización del campo de Dirac es lo suficientemente rica como para determinar localmente la métrica del espacio-tiempo y explicar la ap... | es |
Crystals arise as the result of the breaking of a spatial translation symmetry. Similarly, translation symmetries can also be broken in time so that discrete time crystals appear. Here, we introduce a method to describe, characterize, and explore the physical phenomena related to this phase of matter using tools from g... | 結晶は空間並進対称性の破れの結果として生じる。同様に、時間における並進対称性も破れ、離散的な時間結晶が現れることがある。本研究では、グラフ理論の手法を用いて、この物質相に関連する物理現象を記述し、特徴付け、探求する方法を提案する。グラフの解析により、時間結晶秩序を可視化し、量子系の特徴を分析することが可能になる。例えば、周期2の離散時間結晶の最小モデルの融解過程を詳細に調べ、対応するグラフ構造の進化の観点からこれを記述する。融解過程において、ネットワークの進化が優先的接続機構を示し、それがスケールフリー・ネットワークの存在と直接関連していることを示す。このように、本手法により、時間結晶を複雑な量子ネットワークの量子シミュレータとして... | ja |
The mixing of the quasifission component to the fissionlike cross section causes ambiguity in the quantitative estimation of the complete fusion cross section from the observed angular and mass distributions of the binary products. We show that the partial cross section of quasifission component of binary fragments cov... | İkili ürünlerin gözlemlenen açısal ve kütle dağılımlarından tam erime kesit alanının niceliksel olarak tahmin edilmesini, kuazibölünme bileşeninin bölünmeye benzer kesit alanı ile karışması zorlaştırır. Kuazibölünme bileşeninin kısmi kesit alanının, kapama sürecine yol açan tüm açısal momentum değerlerinin aralığını ka... | tr |
For several decades, the interest of the scientific community in aneutronic fusion reactions such as proton-Boron fusion has grown because of potential applications in different fields. Recently, many scientific teams in the world have worked experimentally on the possibility to trigger proton-Boron fusion using intens... | Selama beberapa dekad, minat komuniti saintifik terhadap tindak balas pelakuran tanpa neutron seperti pelakuran proton-boron telah meningkat disebabkan oleh potensi aplikasinya dalam pelbagai bidang. Baru-baru ini, ramai pasukan saintifik di seluruh dunia telah bekerja secara eksperimen dalam kemungkinan mencetuskan pe... | ms |
Crystals arise as the result of the breaking of a spatial translation symmetry. Similarly, translation symmetries can also be broken in time so that discrete time crystals appear. Here, we introduce a method to describe, characterize, and explore the physical phenomena related to this phase of matter using tools from g... | Kristal terbentuk sebagai akibat daripada pecahan simetri terjemahan ruang. Begitu juga, simetri terjemahan juga boleh pecah dalam masa sehingga muncul kristal masa diskret. Di sini, kami memperkenalkan satu kaedah untuk menerangkan, mencirikan, dan mengkaji fenomena fizikal yang berkaitan dengan fasa jirim ini menggun... | ms |
We study theoretically the low-energy hole states in Si, Ge, and Ge/Si core/shell nanowires (NWs). The NW core in our model has a rectangular cross section, the results for a square cross section are presented in detail. In the case of Ge and Ge/Si core/shell NWs, we obtain very good agreement with previous theoretical... | Nous étudions théoriquement les états de trous à basse énergie dans les nanofils (NWs) en Si, Ge et Ge/Si à structure cœur/invelope. Dans notre modèle, le cœur du nanofil présente une section transversale rectangulaire ; les résultats pour une section carrée sont présentés en détail. Dans le cas des nanofils en Ge et G... | fr |
Permutation entropy techniques can be useful in identifying anomalies in paleoclimate data records, including noise, outliers, and post-processing issues. We demonstrate this using weighted and unweighted permutation entropy of water-isotope records in a deep polar ice core. In one region of these isotope records, our ... | Maaaring kapaki-pakinabang ang mga teknik ng permutation entropy sa pagkilala ng mga anomalya sa mga talaan ng paleoclimate data, kabilang ang ingay, mga outlier, at mga isyu sa post-processing. Ipinapakita namin ito gamit ang timbang at di-timbang na permutation entropy ng mga talaan ng water-isotope sa isang malalim ... | tl |
We study the thermal transport properties of three CaF$_{2}$ polymorphs up to a pressure of 30 GPa using first-principle calculations and an interatomic potential based on machine learning. The lattice thermal conductivity $\kappa$ is computed by iteratively solving the linearized Boltzmann transport equation (BTE) and... | Studiamo le proprietà di trasporto termico di tre polimorfi di CaF$_{2}$ fino a una pressione di 30 GPa utilizzando calcoli ab initio e un potenziale interatomico basato sull'apprendimento automatico. La conducibilità termica reticolare $\kappa$ viene calcolata risolvendo iterativamente l'equazione lineare di Boltzmann... | it |
We discuss stochastic calculus for large classes of Gaussian processes, based on rough path analysis. Our key condition is a covariance measure structure combined with a classical criterion due to Jain and Monrad [Ann. Probab. 11 (1983) 46-57]. This condition is verified in many examples, even in absence of explicit ex... | Zabýváme se stochastickým počtem pro široké třídy gaussovských procesů založeným na analýze drsných cest. Naším klíčovým předpokladem je struktura míry kovariance spojená s klasickým kritériem Jain a Monrad [Ann. Probab. 11 (1983) 46-57]. Tento předpoklad je ověřen v mnoha příkladech, dokonce i v případech, kdy nejsou ... | cs |
The gaussian damping factor (g.d.f.) and the new interaction vertex with the symplectic tensor are the characteristic properties of the N-point scalar-vector scattering amplitudes of the p-p' (p < p') open string system which realizes noncommutative geometry. The g.d.f. is here interpreted as a form factor of the Dp-br... | Faktor redaman gaussian (g.d.f.) dan verteks interaksi baru dengan tensor simplektik merupakan sifat khas dari amplitudo hamburan skalar-vektor N-titik pada sistem tali terbuka p-p' (p < p') yang mewujudkan geometri nonkomutatif. Dalam tulisan ini, g.d.f. ditafsirkan sebagai faktor bentuk dari Dp-brana oleh arus U(1) n... | id |
Robots which interact with the physical world will benefit from a fine-grained tactile understanding of objects and surfaces. Additionally, for certain tasks, robots may need to know the haptic properties of an object before touching it. To enable better tactile understanding for robots, we propose a method of classify... | Los robots que interactúan con el mundo físico se beneficiarán de una comprensión táctil detallada de objetos y superficies. Además, para ciertas tareas, los robots podrían necesitar conocer las propiedades hápticas de un objeto antes de tocarlo. Para permitir una mejor comprensión táctil en los robots, proponemos un m... | es |
A new kind of quantum indeterminacy of transverse position is shown to arise from quantum degrees of freedom of spacetime, based on the assumption that classical trajectories can be defined no better than the diffraction limit of Planck scale waves. Indeterminacy of the angular orientation of particle trajectories due ... | แสดงให้เห็นว่าเกิดความไม่แน่นอนแบบควอนตัมรูปแบบใหม่ของตำแหน่งแนวขวางขึ้นจากองศาอิสระเชิงควอนตัมของกาลอวกาศ โดยอิงจากสมมติฐานที่ว่าเส้นทางคลาสสิกไม่สามารถนิยามได้แม่นยำไปกว่าขีดจำกัดการเลี้ยวเบนของคลื่นที่มาตราส่วนพลังค์ ความไม่แน่นอนของทิศทางเชิงมุมของเส้นทางอนุภาคอันเนื่องมาจากการเป็นคลื่นและอนุภาคพร้อมกันที่มาตราส่วน... | th |
Transportation systems often rely on understanding the flow of vehicles or pedestrian. From traffic monitoring at the city scale, to commuters in train terminals, recent progress in sensing technology make it possible to use cameras to better understand the demand, i.e., better track moving agents (e.g., vehicles and p... | Các hệ thống giao thông thường phụ thuộc vào việc hiểu rõ dòng di chuyển của phương tiện hoặc người đi bộ. Từ việc giám sát giao thông ở quy mô thành phố, đến hành khách tại các nhà ga xe lửa, những tiến bộ gần đây trong công nghệ cảm biến đã cho phép sử dụng camera để hiểu rõ hơn về nhu cầu, tức là theo dõi hiệu quả h... | vi |
Although accelerator technology has matured sufficiently, state-of-the-art X-ray linacs for radiotherapy and cargo-scanning capture merely 30-50% of the electrons from a thermionic cathode, requiring a higher cathode current and leaving uncaptured electrons to cause problems due to back bombardment, shortening of catho... | Bagaman sapat na ang pagtanda ng teknolohiya ng accelerator, ang pinakabagong X-ray linacs para sa radiotherapy at pagsusuri ng karga ay nakakakuha lamang ng 30-50% ng mga electron mula sa thermionic cathode, na nangangailangan ng mas mataas na cathode current at iniwan ang mga hindi na-capture na electron upang magdul... | tl |
We present optical photopolarimetric observations of the BL Lac object S4 0954+658 obtained with the 70-cm telescope in Crimea, 40-cm telescope in St.Petersburg, and 1.8-m Perkins telescope at Lowell Observatory (Flagstaff, Az). After a faint state with a brightness level R ~17.6 mag registered in the first half of Jan... | Nous présentons des observations photopolarimétriques optiques de l'objet BL Lac S4 0954+658 obtenues avec le télescope de 70 cm en Crimée, le télescope de 40 cm à Saint-Pétersbourg et le télescope Perkins de 1,8 m à l'Observatoire Lowell (Flagstaff, Arizona). Après un état faible avec un niveau de luminosité R ~17,6 m... | fr |
We report molecular line and dust continuum observations, made with the SEST telescope, towards four young high-mass star forming regions associated with highly luminous (L> 6x10^5 Lsun) IRAS sources (15290-5546, 15502-5302, 15567-5236 and 16060-5146). Molecular emission was mapped in lines of CS (J=2-1, 3-2 and 5-4), ... | Kami melaporkan pengamatan garis molekuler dan kontinum debu yang dilakukan dengan teleskop SEST menuju empat wilayah pembentukan bintang bermassa tinggi muda yang terkait dengan sumber IRAS yang sangat luminos (L > 6x10^5 Lsun) (15290-5546, 15502-5302, 15567-5236 dan 16060-5146). Emisi molekuler dipetakan dalam garis-... | id |
We discuss stochastic calculus for large classes of Gaussian processes, based on rough path analysis. Our key condition is a covariance measure structure combined with a classical criterion due to Jain and Monrad [Ann. Probab. 11 (1983) 46-57]. This condition is verified in many examples, even in absence of explicit ex... | 我々はラフパス解析に基づく広範なクラスのガウス過程に対する確率解析を論じる。我々の主要な条件は、JainおよびMonrad [Ann. Probab. 11 (1983) 46-57] による古典的基準と組み合わせた共分散測度構造である。この条件は、共分散やボルテラカーネルの明示的表現が得られない場合でさえ、多くの例で満たされる。特に興味深いのは、共分散自体がフーリエ級数で与えられるランダムフーリエ級数であり、我々はフーリエ係数そのものを用いて直接的に条件を定式化する。また、このようなランダムフーリエ級数への近似の、ラフパス距離における収束および収束速度を確立する。SPDEへの応用も与える。我々の基準は、さらにキャメロン-マーティン... | ja |
The light emission rate of a single quantum dot can be drastically enhanced by embedding it in a resonant semiconductor microcavity. This phenomenon is known as the Purcell effect, and the coupling strength between emitter and cavity can be quantified by the Purcell factor. The most natural way for probing the Purcell ... | 단일 양자점의 발광 속도는 이를 공진 반도체 마이크로공진기 내에 삽입함으로써 극적으로 증가시킬 수 있다. 이러한 현상을 퍼셀 효과(Purcell effect)라고 하며, 방출체와 공진기 간의 결합 강도는 퍼셀 계수(Purcell factor)로 정량화할 수 있다. 퍼셀 효과를 조사하는 가장 자연스러운 방법은 시간 분해 측정이다. 그러나 이 방법이 항상 가장 편리한 것은 아니며, 연속파 측정에 기반한 대안적 접근이 더 적합한 경우가 종종 있다. 실제로 양자점이 공진기 모드와 공진 상태에 있을 때, 연속파 측정을 통해 퍼셀 효과의 다양한 징후들을 관찰할 수 있다(양자점 ... | ko |
The deep reinforcement learning method usually requires a large number of training images and executing actions to obtain sufficient results. When it is extended a real-task in the real environment with an actual robot, the method will be required more training images due to complexities or noises of the input images, ... | Ang paraan ng malalim na reinforcement learning ay karaniwang nangangailangan ng malaking bilang ng mga imahe sa pagsasanay at pagpapatupad ng mga aksyon upang makakuha ng sapat na resulta. Kapag ito ay inilapat sa tunay na gawain sa tunay na kapaligiran gamit ang aktwal na robot, mas marami pang mga imahe sa pagsasana... | tl |
The emerging new paradigm of technologies, the internet of things, entails a process of device miniaturization to combine several functional components, such as sensors, actuators, and powering elements, in a single individual on-chip platform. An essential requirement is for the devices to have a small footprint and t... | Paradigma baharu teknologi yang muncul, iaitu internet benda, melibatkan proses pengecilan peranti untuk menggabungkan beberapa komponen berfungsi, seperti sensor, aktuator, dan elemen pemberi kuasa, ke dalam satu platform tunggal bersepadu pada cip. Keperluan penting adalah peranti-peranti ini mempunyai tapak yang kec... | ms |
En este trabajo, se obtiene una expresi\'on num\'erica para calcular el espectro de emisi\'on de un sistema microcavidad-punto cu\'antico usando una teor\'ia de campo medio en el formalismo de la matriz densidad. El sistema modelado es un micropilar semiconductor que contiene un \'unico punto cu\'antico en el interior ... | Bu çalışmada, yoğunluk matrisi formalizminde bir ortalama alan teorisi kullanarak, kuantum nokta-mikrorezonatör sistemi için emisyon spektrumunu hesaplamak üzere sayısal bir ifade elde edilir. Modellenen açık sistem, mikrorezonatörün içinde tek bir kuantum nokta bulunan tipik bir yarıiletken mikrosütundur ve bu sistem,... | tr |
The generalized belief propagation (GBP), introduced by Yedidia et al., is an extension of the belief propagation (BP) algorithm, which is widely used in different problems involved in calculating exact or approximate marginals of probability distributions. In many problems, it has been observed that the accuracy of GB... | Yedidia らによって導入された一般化信念伝播（GBP）は、確率分布の周辺分布を正確または近似的に計算するさまざまな問題で広く用いられている信念伝播（BP）アルゴリズムの拡張である。多くの問題において、GBPの精度がBPを著しく上回ることが観察されている。しかし、一般にGBPの計算複雑度はBPよりも高いため、実用上の適用が制限されている。本論文では、Noorshams らによって導入された確率的BP（SBP）アルゴリズムの拡張と見なせる、確率的一般化信念伝播（SGBP）という確率的版のGBPを導入する。彼らは、SBPがBPの反復あたりの計算複雑度をアルファベットサイズに関して桁違いに削減できることを示している。これに対して、SG... | ja |
Foreseeing the era of high spatial resolution measurements of the Sunyaev-Zel'dovich effect (SZE) in clusters of galaxies, we present a prototype analysis of this sort combined with Chandra X-ray data. It is applied specifically to RX J1347-1145 at z=0.451, the most X-ray-luminous galaxy cluster known, for which the hi... | مع توقعنا لعصر القياسات عالية الدقة المكانية لتأثير سونيايف-زيلدوفيتش (SZE) في عناقيد المجرات، نقدم تحليلًا أوليًا نموذجيًا لهذا النوع من القياسات بالاقتران مع بيانات أشعة إكس من تلسكوب تشاندرا. ويطبق هذا التحليل تحديدًا على عناقيد RX J1347-1145 عند الانزياح الأحمر z=0.451، وهو العنقود المجري الأكثر سطوعًا المعروف في أ... | ar |
Self-supervised methods play an increasingly important role in monocular depth estimation due to their great potential and low annotation cost. To close the gap with supervised methods, recent works take advantage of extra constraints, e.g., semantic segmentation. However, these methods will inevitably increase the bur... | Kaedah-kaedah pensusun sendiri memainkan peranan yang semakin penting dalam anggaran kedalaman monokular kerana potensinya yang besar dan kos pelabelan yang rendah. Untuk mengurangkan jurang dengan kaedah-kaedah terselia, kajian-kajian terkini memanfaatkan kekangan tambahan, contohnya, pemisahan semantik. Namun begitu,... | ms |
We present optical photopolarimetric observations of the BL Lac object S4 0954+658 obtained with the 70-cm telescope in Crimea, 40-cm telescope in St.Petersburg, and 1.8-m Perkins telescope at Lowell Observatory (Flagstaff, Az). After a faint state with a brightness level R ~17.6 mag registered in the first half of Jan... | Chúng tôi trình bày các quan sát quang học về phân cực ánh sáng của đối tượng BL Lac S4 0954+658 thu được bằng kính thiên văn 70-cm tại Crimea, kính thiên văn 40-cm tại St.Petersburg và kính thiên văn Perkins 1,8-m tại Đài quan sát Lowell (Flagstaff, Az). Sau giai đoạn mờ với mức độ sáng R ~17,6 mag được ghi nhận trong... | vi |
We wish to use graded structures [KrVu87], [Vu01] on dffierential operators and quasimodular forms on classical groups and show that these structures provide a tool to construct p-adic measures and p-adic L-functions on the corresponding non-archimedean weight spaces. An approach to constructions of automorphic L-funct... | نرغب في استخدام البنى المرتبة [KrVu87]، [Vu01] على المؤثرات التفاضلية والأشكال شبه النمطية على الزمر الكلاسيكية، ونُظهر أن هذه البنى توفر أداة لبناء مقاييس p-adic ودوال-L p-adic على فضاءات الأوزان غير الأرخميدية المقابلة. ويُقدَّم نهج لبناء دوال-L التلقائية على الزمر الوحدوية وتماثلاتها p-adic. بالنسبة لزمرة جبرية G فو... | ar |
Semi-competing risks refer to the setting where primary scientific interest lies in estimation and inference with respect to a non-terminal event, the occurrence of which is subject to a terminal event. In this paper, we present the R package SemiCompRisks that provides functions to perform the analysis of independent/... | Ang semi-competing risks ay tumutukoy sa isang sitwasyon kung saan ang pangunahing layunin ng siyentipikong pagsusuri ay ang pagtataya at pag-infer tungkol sa isang hindi pampatay na pangyayari (non-terminal event), na ang pag-iral ay nakasalalay sa isang pampatay na pangyayari (terminal event). Sa papel na ito, ipinak... | tl |
We study the signals for supersymmetry at the Tevatron and DiTevatron ($\sqrt{s}=4\TeV$) in various well-motivated supersymmetric models. We consider the trilepton signature in the decay of pair-produced charginos and neutralinos, the missing energy signature in gluino and squark production, and the $b\bar b$ signal in... | Мы исследуем сигналы суперсимметрии на Теватроне и ДиТеватроне ($\sqrt{s}=4\ТэВ$) в различных хорошо обоснованных суперсимметричных моделях. Рассматриваются сигнатуры с тремя лептонами в распаде парно образующихся чarginов и нейтралов, сигнатуры с пропавшей энергией при образовании глюино и скалярных кварков, а также с... | ru |
We investigate the propagation of locally plane, small-amplitude, monochromatic gravitational waves through cold compressible interstellar gas in order to provide a more accurate picture of expected waveforms for direct detection. The quasi-isothermal gas is concentrated in a spherical symmetric cloud held together by ... | Мы исследуем распространение локально плоских, малой амплитуды, монохроматических гравитационных волн через холодный сжимаемый межзвёздный газ с целью получения более точной картины ожидаемых форм сигналов для прямого обнаружения. Квазиизотермический газ сосредоточен в сферически-симметричном облаке, удерживаемом вмест... | ru |
We study the signals for supersymmetry at the Tevatron and DiTevatron ($\sqrt{s}=4\TeV$) in various well-motivated supersymmetric models. We consider the trilepton signature in the decay of pair-produced charginos and neutralinos, the missing energy signature in gluino and squark production, and the $b\bar b$ signal in... | Nous étudions les signaux de la supersymétrie au Tevatron et au DiTevatron ($\sqrt{s}=4\TeV$) dans divers modèles supersymétriques bien motivés. Nous considérons la signature à trois leptons dans la désintégration de charginos et de neutralinos produits par paires, la signature d'énergie manquante dans la production de... | fr |
To realize efficient computational fluid dynamics (CFD) prediction of two-phase flow, a multi-scale framework was proposed in this paper by applying a physics-guided data-driven approach. Instrumental to this framework, Feature Similarity Measurement (FSM) technique was developed for error estimation in two-phase flow ... | Para lograr una predicción eficiente mediante dinámica de fluidos computacional (CFD) del flujo bifásico, en este artículo se propone un marco multiescala basado en un enfoque de datos guiado por la física. Fundamental para este marco, se desarrolló la técnica de Medición de Similitud de Características (FSM) para la e... | es |
We present a theoretical study of the spin transport properties of mono-atomic magnetic chains with a focus on the spectroscopical features of the I-V curve associated to spin-flip processes. Our calculations are based on the s-d model for magnetism with the electron transport treated at the level of the non-equilibriu... | Kami menyajikan studi teoretis mengenai sifat transportasi spin pada rantai magnetik mono-atomik dengan fokus pada ciri-ciri spektroskopi kurva I-V yang terkait dengan proses spin-flip. Perhitungan kami didasarkan pada model s-d untuk magnetisme dengan transportasi elektron yang ditangani pada tingkat formalisme fungsi... | id |
Let ${\widetilde {\mathcal O}}(\mathbf B)$ be the category of (open) subcategories of a topological groupoid ${\mathbf B}.$ This paper concerns with the ${\mathbf {Cat}}$-valued sheaves over category ${\widetilde {\mathcal O}}(\mathbf B).$ Since ${\mathbf {Cat}}$ is not a concrete category, traditional definition of pr... | Hayaan ang ${\widetilde {\mathcal O}}(\mathbf B)$ na maging ang kategorya ng mga (bukas) subkategorya ng isang topolohikal na groupoid na ${\mathbf B}.$ Ang papel na ito ay tungkol sa mga ${\mathbf {Cat}}$-halagang sheaf sa kategorya na ${\widetilde {\mathcal O}}(\mathbf B).$ Dahil ang ${\mathbf {Cat}}$ ay hindi isang ... | tl |
Foreseeing the era of high spatial resolution measurements of the Sunyaev-Zel'dovich effect (SZE) in clusters of galaxies, we present a prototype analysis of this sort combined with Chandra X-ray data. It is applied specifically to RX J1347-1145 at z=0.451, the most X-ray-luminous galaxy cluster known, for which the hi... | Anticipant l'ère des mesures à haute résolution spatiale de l'effet Sunyaev-Zel'dovich (SZE) dans les amas de galaxies, nous présentons une analyse prototype de ce type combinée à des données de rayons X provenant de Chandra. Cette analyse est appliquée spécifiquement à RX J1347-1145 à z=0,451, l'amas de galaxies le pl... | fr |
The gaussian damping factor (g.d.f.) and the new interaction vertex with the symplectic tensor are the characteristic properties of the N-point scalar-vector scattering amplitudes of the p-p' (p < p') open string system which realizes noncommutative geometry. The g.d.f. is here interpreted as a form factor of the Dp-br... | عامل التخميد الغاوسي (g.d.f.) والقمة التفاعلية الجديدة مع التنسور السيمبليكتية هي الخصائص المميزة لسعة التشتت العددي-المتجهي بنقاط N في نظام الأوتار المفتوحة p-p' (p < p') الذي يحقق الهندسة غير الإبدالية. ويُفسَّر عامل التخميد الغاوسي هنا كعامل شكل لـ Dp-الغشاء من خلال تيار U(1) غير الإبدالي. وباﻻنتباه إلى أن عامل التخ... | ar |
The mixing of the quasifission component to the fissionlike cross section causes ambiguity in the quantitative estimation of the complete fusion cross section from the observed angular and mass distributions of the binary products. We show that the partial cross section of quasifission component of binary fragments cov... | Le mélange de la composante de quasi-fission à la section efficace de type fission crée une ambiguïté dans l'estimation quantitative de la section efficace de fusion complète à partir des distributions angulaires et massiques observées des produits binaires. Nous montrons que la section efficace partielle de la composa... | fr |
Integrating sensing into standardized communication systems can potentially benefit many consumer applications that require both radio frequency functions. However, without an effective sensing method, such integration may not achieve the expected gains of cost and energy efficiency. Existing sensing methods, which use... | Die Integration von Sensoren in standardisierte Kommunikationssysteme kann zahlreiche Verbraucheranwendungen, die sowohl Funkfrequenzfunktionen erfordern, möglicherweise erheblich verbessern. Ohne eine effektive Sensormethode könnte diese Integration jedoch die erwarteten Vorteile hinsichtlich Kosteneffizienz und Energ... | de |
We consider an unmanned aerial vehicle enabled (UAV-enabled) fog-radio access network (F-RAN) in which UAVs are considered as flying remote radio heads (RRH) equipped with caching and cooperative communications capabilities. We are mainly focus on probabilistic/randomized content placement strategy, and accordingly for... | 我们考虑一种无人机使能（UAV-enabled）的雾无线接入网络（F-RAN），其中无人机被视为配备缓存和协作通信能力的飞行远程射频单元（RRH）。我们主要关注概率性/随机性内容放置策略，并据此将内容放置问题建模为一个优化问题。随后，我们通过评估系统的平均容量及其能效来研究所提出内容放置策略的有效性。结果表明，协作通信在无人机使能的边缘通信中起着至关重要的作用，因为它有效抑制了主导的视距（LOS）接收干扰的影响。同时还可以观察到，协作缓存使能的无人机F-RAN在高层建筑环境中表现优于密集城区和郊区环境。这是由于高层建筑对信号的遮挡显著降低了接收到的LOS干扰，同时协作通信对接收信号带来了性能增益。将所提出的内容放置策略与传统缓存技术... | zh |
The generalized belief propagation (GBP), introduced by Yedidia et al., is an extension of the belief propagation (BP) algorithm, which is widely used in different problems involved in calculating exact or approximate marginals of probability distributions. In many problems, it has been observed that the accuracy of GB... | Yedidia ve diğerleri tarafından tanıtılan genelleştirilmiş inanç yayılımı (GBP), olasılık dağılımlarının kesin veya yaklaşık marjinalarının hesaplanmasıyla ilgili çeşitli problemlerde yaygın olarak kullanılan inanç yayılımı (BP) algoritmasının bir uzantısıdır. Birçok problemde, GBP'nin doğruluğunun BP'ye kıyasla önemli... | tr |
We use the Kubo-Landauer formalism to compute the longitudinal (two-terminal) conductance of a two dimensional electron system placed in a strong perpendicular magnetic field, and subjected to periodic modulations and/or disorder potentials. The scattering problem is recast as a set of inhomogeneous, coupled linear equ... | Kami menggunakan formalisme Kubo-Landauer untuk mengira kealiran longitudinal (dua-terminal) sistem elektron dua dimensi yang diletakkan dalam medan magnet menegak yang kuat, dan dikenakan modulasi berkala dan/atau keupayaan kekacauan. Masalah serakan ditulis semula sebagai satu set persamaan linear tak homogen yang sa... | ms |
The Lorentz gas is a billiard model involving a point particle diffusing deterministically in a periodic array of convex scatterers. In the two dimensional finite horizon case, in which all trajectories involve collisions with the scatterers, displacements scaled by the usual diffusive factor $\sqrt{t}$ are normally di... | 洛伦兹气体是一种台球模型，涉及一个质点在周期性排列的凸散射体中确定性地扩散。在二维有限视界情况下，即所有轨迹均与散射体发生碰撞时，位移经通常的扩散因子 $\sqrt{t}$ 缩放后服从正态分布，这是 Bunimovich 和 Sinai 在 1981 年证明的结果。在无限视界情况下，运动呈现超扩散特性，但当以 $\sqrt{t\ln t}$ 进行缩放时，仍可恢复正态分布，并可给出其方差的显式表达式。本文探讨了任意维度下的无限视界情形，给出了均方位移的显式公式，论证了其与极限分布方差的不同之处，揭示了在散射体尺寸趋近于零的极限下与黎曼假设的联系，并提供了证据表明存在一个临界维度 $d=6$，超过该维度后，关联衰减呈现出分数幂律行为。这... | zh |
We establish quantitative properties of minimizers and stable sets for nonlocal interaction functionals, including the $s$-fractional perimeter as a particular case. On the one hand, we establish universal $BV$-estimates in every dimension $n\ge 2$ for stable sets. Namely, we prove that any stable set in $B_1$ has fi... | Chúng tôi thiết lập các tính chất định lượng của các hàm cực tiểu và các tập hợp ổn định đối với các phiếm hàm tương tác không địa phương, trong đó bao gồm chu vi phân số $s$ như một trường hợp đặc biệt. Về một mặt, chúng tôi thiết lập các ước lượng $BV$ phổ dụng trong mọi chiều $n\ge 2$ đối với các tập hợp ổn định. Cụ... | vi |
We present a unified picture of outflowing gas from the X-ray binary system Hercules X-1/HZ Herculis. We suggest that the outflowing gas (a wind) causes UV emission seen in mid-eclipse, narrow UV absorption lines, and broad UV P Cygni lines. Observations with the FOS and STIS spectrographs on the Hubble Space Telescope... | Мы представляем единую картину истекающего газа из рентгеновской двойной системы Геркулес X-1/HZ Геркулес. Мы предполагаем, что истекающий газ (ветер) вызывает ультрафиолетовое излучение, наблюдаемое в середине затмения, узкие ультрафиолетовые линии поглощения и широкие ультрафиолетовые линии типа P Cygni. Наблюдения с... | ru |
Charginos $\tilde{\chi}^\pm$ and neutralinos $\tilde{\chi}^0$ in supersymmetric theories can be produced copiously at $e^+e^-$ colliders and their properties can be measured with high accuracy. Consecutively to the chargino system, in which the SU(2) gaugino parameter $M_2$, the higgsino mass parameter $\mu$ and $\tan\... | Заряженные частицы $\tilde{\chi}^\pm$ и нейтральные частицы $\tilde{\chi}^0$ в суперсимметричных теориях могут интенсивно рождаться на коллайдерах $e^+e^-$, и их свойства могут быть измерены с высокой точностью. После исследования системы заряженных частиц, в которой определяются параметр SU(2) гейджино $M_2$, параметр... | ru |
Let ${\widetilde {\mathcal O}}(\mathbf B)$ be the category of (open) subcategories of a topological groupoid ${\mathbf B}.$ This paper concerns with the ${\mathbf {Cat}}$-valued sheaves over category ${\widetilde {\mathcal O}}(\mathbf B).$ Since ${\mathbf {Cat}}$ is not a concrete category, traditional definition of pr... | Nechť ${\widetilde {\mathcal O}}(\mathbf B)$ je kategorie (otevřených) podkategorií topologické grupoidy ${\mathbf B}.$ Tento článek se zabývá ${\mathbf {Cat}}$-hodnotnými svazky nad kategorií ${\widetilde {\mathcal O}}(\mathbf B).$ Protože ${\mathbf {Cat}}$ není konkrétní kategorie, tradiční definice presvazku tuto si... | cs |
We investigate the propagation of locally plane, small-amplitude, monochromatic gravitational waves through cold compressible interstellar gas in order to provide a more accurate picture of expected waveforms for direct detection. The quasi-isothermal gas is concentrated in a spherical symmetric cloud held together by ... | Investigamos la propagación de ondas gravitacionales monocromáticas, de pequeña amplitud y localmente planas, a través de un gas interestelar frío y compresible con el fin de proporcionar una imagen más precisa de las formas de onda esperadas para la detección directa. El gas cuasi-isotermo está concentrado en una nube... | es |
We study theoretically the low-energy hole states in Si, Ge, and Ge/Si core/shell nanowires (NWs). The NW core in our model has a rectangular cross section, the results for a square cross section are presented in detail. In the case of Ge and Ge/Si core/shell NWs, we obtain very good agreement with previous theoretical... | Kami mempelajari secara teoritis keadaan lubang berenergi rendah dalam kawat nano (NW) Si, Ge, dan Ge/Si inti/selubung. Inti NW dalam model kami memiliki penampang berbentuk persegi panjang, sedangkan hasil untuk penampang berbentuk persegi disajikan secara terperinci. Dalam kasus NW Ge dan Ge/Si inti/selubung, kami me... | id |
Permutation entropy techniques can be useful in identifying anomalies in paleoclimate data records, including noise, outliers, and post-processing issues. We demonstrate this using weighted and unweighted permutation entropy of water-isotope records in a deep polar ice core. In one region of these isotope records, our ... | Permutation-Entropie-Methoden können nützlich sein, um Anomalien in paläoklimatischen Datensätzen zu identifizieren, einschließlich Rauschen, Ausreißer und Probleme nach der Datenaufbereitung. Wir zeigen dies anhand gewichteter und ungewichteter Permutation-Entropie von Wasserisotop-Datensätzen aus einem tiefen polar-i... | de |
We study the Wouthuysen-Field coupling at early universe with numerical solutions of the integrodifferential equation describing the kinetics of photons undergoing resonant scattering. The numerical solver is developed based on the weighted essentially non-oscillatory (WENO) scheme for the Boltzmann-like integrodiffere... | Chúng tôi nghiên cứu sự ghép nối Wouthuysen-Field trong vũ trụ sơ khai bằng các nghiệm số của phương trình tích phân-vi phân mô tả động học các photon trải qua tán xạ cộng hưởng. Bộ giải số được phát triển dựa trên sơ đồ trọng số về cơ bản không dao động (WENO) cho phương trình tích phân-vi phân kiểu Boltzmann. Chúng t... | vi |
Permutation entropy techniques can be useful in identifying anomalies in paleoclimate data records, including noise, outliers, and post-processing issues. We demonstrate this using weighted and unweighted permutation entropy of water-isotope records in a deep polar ice core. In one region of these isotope records, our ... | يمكن أن تكون تقنيات الإنتروبيا التباديلية مفيدة في تحديد الشذوذات في السجلات المناخية القديمة، بما في ذلك الضوضاء والقيم الشاذة ومشاكل ما بعد المعالجة. نُظهر ذلك باستخدام الإنتروبيا التباديلية المرجحة وغير المرجحة لسجلات النظائر المائية في عينة جليدية قطبية عميقة. في إحدى مناطق هذه السجلات النظائرية، كشفت حساباتنا السا... | ar |
The Fredholm determinants of a special class of integral operators K supported on the union of m curve segments in the complex plane are shown to be the tau-functions of an isomonodromic family of meromorphic covariant derivative operators D_l. These have regular singular points at the 2m endpoints of the curve segment... | Si dimostra che i determinanti di Fredholm di una classe speciale di operatori integrali K, definiti sull'unione di m segmenti di curva nel piano complesso, sono funzioni tau di una famiglia isomonodromica di operatori meromorfi di derivata covariante D_l. Questi operatori presentano punti singolari regolari alle 2m es... | it |
I review recent numerical and analytical work on the feedback from both low- and high-mass cluster stars into their gasoeus environment. The main conclusions are that i) outflow driving appears capable of maintaing the turbulence in parsec-sized clumps and retarding their collapse from the free-fall rate, although ther... | Reviso trabajos recientes numéricos y analíticos sobre la retroalimentación proveniente tanto de estrellas masivas como de baja masa en cúmulos hacia su entorno gaseoso. Las principales conclusiones son que i) el impulso de outflows parece capaz de mantener la turbulencia en cúmulos del tamaño del pársec y retrasar su ... | es |
Multisensory object-centric perception, reasoning, and interaction have been a key research topic in recent years. However, the progress in these directions is limited by the small set of objects available -- synthetic objects are not realistic enough and are mostly centered around geometry, while real object datasets ... | Мультисенсорное восприятие, рассуждение и взаимодействие, ориентированные на объекты, в последнее время стали важной темой исследований. Однако прогресс в этих направлениях ограничен небольшим набором доступных объектов — синтетические объекты недостаточно реалистичны и в основном сосредоточены на геометрии, тогда как ... | ru |
We discuss stochastic calculus for large classes of Gaussian processes, based on rough path analysis. Our key condition is a covariance measure structure combined with a classical criterion due to Jain and Monrad [Ann. Probab. 11 (1983) 46-57]. This condition is verified in many examples, even in absence of explicit ex... | Kami membincangkan kalkulus stokastik bagi kelas besar proses Gauss, berdasarkan analisis laluan kasar. Syarat utama kami ialah struktur ukuran kovarians yang digabungkan dengan kriteria klasik oleh Jain dan Monrad [Ann. Probab. 11 (1983) 46-57]. Syarat ini disahkan dalam banyak contoh, walaupun tanpa ungkapan eksplisi... | ms |
We study theoretically the low-energy hole states in Si, Ge, and Ge/Si core/shell nanowires (NWs). The NW core in our model has a rectangular cross section, the results for a square cross section are presented in detail. In the case of Ge and Ge/Si core/shell NWs, we obtain very good agreement with previous theoretical... | Wir untersuchen theoretisch die niederenergetischen Lochzustände in Si-, Ge- und Ge/Si-Kern/Mantel-Nanodrähten (NWs). Der NW-Kern in unserem Modell besitzt einen rechteckigen Querschnitt; ausführliche Ergebnisse werden für einen quadratischen Querschnitt präsentiert. Im Fall von Ge- und Ge/Si-Kern/Mantel-Nanodrähten er... | de |
The oversampling multiscale finite element method (MsFEM) is one of the most popular methods for simulating composite materials and flows in porous media which may have many scales. But the method may be inapplicable or inefficient in some portions of the computational domain, e.g., near the domain boundary or near lon... | 과표집 다중스케일 유한요소법(MsFEM)은 다수의 스케일을 가질 수 있는 복합재료 및 다공성 매질 내 유동을 시뮬레이션하는 데 널리 사용되는 방법 중 하나이다. 그러나 계산 영역의 일부 구역, 예를 들어 영역 경계 근처나 영역 내부의 긴 좁은 통로 근처에서는 영역 외부의 투과도 정보 부족 또는 고전도 특성이 조간격 블록 내에서 국소화될 수 없다는 이유로 이 방법이 적용 불가능하거나 비효율적일 수 있다. 본 논문에서는 계산 영역의 이러한 부분에는 미세 격자상의 표준 유한요소법을, 나머지 부분에는 과표집 MsFEM을 사용하는 결합 유한요소-다중스케일 유한요소법(FE-Ms... | ko |
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