bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ultrashort all-fiber Fabry–Perot interferometer fabricated by a CO2 laser
Authors: Zhang Qianqian , Fan Zhiyuan , Zhang Jianping , Zhang Fengbo , Zhang Qiang , Li Yongmin 
Published: September 2020

We proposed and demonstrated a method to fabricate ultrashort all-fiber Fabry–Perot interferometers by splicing a standard single-mode fiber and another single-mode fiber with a concave surface constructed by a

C
O

2

laser pulse. The geometric parameters of the concave surface could be controlled flexibly by adjusting the laser pulse and the relative position between the laser beam and the optical fiber. In our experiments, the minimum depth of the concave surfaces is 0.12 µm, which offers a means of fabricating an all-fiber Fabry−Perot interferometer with submicrometer cavity length. Moreover, the ultralow-roughness concave surface fabricated by a

C
O

2

laser pulse is beneficial to improve the fringe visibility of the interferometer. These advantages make it attractive for practical applications.
THz power optimization and analysis of plasmonic unbiased photoconductive THz emitters coupled to a spiral-like dipole antenna
Authors: Mohammad-Zamani Mohammad Javad 
Published: September 2020

We propose a new spiral-like dipole antenna-coupled and unbiased terahertz (THz) photomixer with plasmonic unsymmetrical interdigitated electrodes (UIEs). Each electrode pair is made of subwavelength metal–semiconductor–metal (MSM) structures constituting heterogeneous Schottky contacts. From the optical view and analysis of the electrical transport in the semiconductor, by applying a systematic procedure to achieve optimum design, it is possible to benefit from advantages of having high THz photocurrent derived from the plasmonic enhanced optical absorption and, hence, photogeneration as well as severe built-in Schottky field in the photoconductor. Furthermore, from the electromagnetic view, by introducing an output resonant THz antenna having great impedance matching with the photomixer device, the efficiency of free-space coupling has significantly been enhanced. By exploiting all aspects of design, it has been provided to achieve the THz power of 409 µW from the spiral-like dipole antenna coupled to the proposed plasmonic UIEs with

10
×
10

µ

m

2

active area and pitch of

Λ
=
395

n
m

. This is more than 1 order of magnitude larger THz power than the highest THz power radiated from the same area of a conventional dipole antenna-coupled unbiased array of the near-field emitters. Also, this improvement is more than 3 orders of magnitude higher THz power as compared with the power radiated from a non-plasmonic far-field operating antenna-less THz chip of the same size.
Near-single-mode 3  kW monolithic fiber oscillator based on a longitudinally spindle-shaped Yb-doped fiber
Authors: Zeng Lingfa , Xi Xiaoming , Ye Yun , Zhang Hanwei , Wang Xiaolin , Pan Zhiyong , Wang Zefeng , Xu Xiaojun 
Published: September 2020

In order to balance the mitigation of transverse mode instability and
stimulated Raman scattering effect in the high power fiber lasers, a
specially designed Yb-doped fiber, named spindle-shaped Yb-doped
fiber, was fabricated with a core/cladding diameter of 20/400 µm at
both ends and 30/600 µm in the middle. Based on this fiber, an
all-fiber laser oscillator was built and over 3 kW near-single-mode (

M

2

factor

∼

1.3

) laser was achieved with an
optical-to-optical conversion efficiency of 78.4%. While operating at
the maximum power, the transverse mode instability is well mitigated
and the stimulated Raman scattering effect is well suppressed (

>

34

d
B

lower than signal laser). Further
power scaling is promising by optimizing the structure of the Yb-doped
fiber.
Few-cycle pulses tunable from 3 to 7  µm via intrapulse difference-frequency generation in oxide LGN crystals
Authors: Liu Jinsheng , Ma Jingui , Lu Dazhi , Gu Xingbin , Cui Ziruo , Yuan Peng , Wang Jing , Xie Guoqiang , Yu Haohai , Zhang Huaijin , Qian Liejia 
Published: September 2020

An ultrashort mid-infrared (IR) source beyond 5 µm is crucial for a plethora of existing and emerging applications in spectroscopy, medical diagnostics, and high-field physics. Nonlinear generation of such sources from well-developed near-IR lasers, however, remains a challenge due to the limitation of mid-IR crystals. Based on oxide

L
a

3

G
a

5.5

N
b

0.5

O

14

(LGN) crystals, here we report the generation of femtosecond pulses tunable from 3 to 7 µm by intrapulse difference-frequency generation of 7.5 fs, 800 nm pulses. The efficiency and bandwidth dependences on pump polarization and crystal length are studied for both Type-I and Type-II phase-matching configurations. Maximum pulse energy of

∼

10

n
J

is generated at 5.2 µm with a conversion efficiency of

∼

0.14

%

. Because of the few-cycle pump pulse duration, the generated mid-IR pulses are as short as about three cycles. These results, to the best of our knowledge, represent the first experimental demonstration of LGN in generating mid-IR ultrashort pulses.
Tingkat Keberlanjutan Pemanfaatan Ruang Publik Multifungsi di Permukiman Kumuh
Authors: Caesandra Violla , Wiranegara Hanny Wahidin , Sugihartoyo Sugihartoyo 
Published: September 2020

Due to the limitation of slum dweller’s residence, they use public spaces for their daily activities. One kind of them is a park. Public space used for various kinds of activities by slum dwellers is called a multifunction public space. Utilization of multifunction public space can potentially lead to spatial use conflict which interfere with its functional sustainability. The aim of this research was to identify the level of sustainability of the utilization of a multifunction public space in the slum area. This research used a quantitative approach and a questionnaires survey method. Respondents were slum dwellers using the park. The total respondents was 96 by using the Lemeshow formula. The results showed that there were differences in the level of sustainability among three parks. The highest level of sustainable utilization is Pendongkelan, the medium level is Melati Indah, and the lowest level is Taman Anggrek. There were four aspects of sustainability which were measured. Diversity and harmony were two aspects determining sustainability. For sustainability of spatial utilization of the multifunction public space in the slum area need management to take care of the size of the park, the availability of park amenities, and its accessibility.
A system design for elastically scaling transaction processing engines in virtualized servers
Authors: Anadiotis Angelos-Christos , Appuswamy Raja , Ailamaki Anastasia , Bronshtein Ilan , Avni Hillel , Dominguez-Sal David , Goikhman Shay , Levy Eliezer 
Published: September 2020

Online Transaction Processing (OLTP) deployments are migrating from on-premise to cloud settings in order to exploit the elasticity of cloud infrastructure which allows them to adapt to workload variations. However, cloud adaptation comes at the cost of redesigning the engine, which has led to the introduction of several, new, cloud-based transaction processing systems mainly focusing on: (i) the transaction coordination protocol, (ii) the data partitioning strategy, and, (iii) the resource isolation across multiple tenants. As a result, standalone OLTP engines cannot be easily deployed with an elastic setting in the cloud and they need to migrate to another, specialized deployment.
In this paper, we focus on workload variations that can be addressed by modern multi-socket, multi-core servers and we present a system design for providing fine-grained elasticity to multi-tenant, scale-up OLTP deployments. We introduce novel components to the virtualization software stack that enable on-demand addition and removal of computing and memory resources. We provide a bi-directional, low-overhead communication stack between the virtual machine and the hypervisor, which allows the former to adapt to variations coming both from the workload and the resource availability. We show that our system achieves NUMA-aware, millisecond-level, stateful and fine-grained elasticity, while it is not intrusive to the design of state-of-the-art, in-memory OLTP engines. We evaluate our system through novel use cases demonstrating that scale-up elasticity increases resource utilization, while allowing tenants to pay for actual use of resources and not just their reservation.
JIT works
Authors: Ailamaki Anastasia 
Published: September 2020

When the time comes to make a critical decision, it is of paramount importance to prepare enough so that all the information necessary is available at decision time. Under-preparation leads to uninformed decisions; over-preparation, however, may lead to conservative decisions. Often a decision seems suboptimal after its consequences are known; regret is a typical reaction in such a situation.

In life and in my research I have often followed the wrong path. More accurately, I have often followed a path that led to suboptimal results or unwanted consequences. The difficulty is to fight the urge to regret and rather
learn
from the process; divide the input that led to the wrong path into the part that could have been made better (and is the reason for the suboptimal outcome) and the part that was already as good as it gets. Next time, prepare less for the former while keeping the latter an invariant.

We are often faced with daunting decisions when designing database systems on modern heterogeneous, ever-faster hardware platforms. After having built hierarchical, object-oriented, relational, and just-in-time (JIT) systems by myself or with a team, I realize that a great deal of the performance is determined less from determining what data model to use or what index to build ahead of time and more from making decisions at the right time. Educated JIT works using mathematics and dynamic programming, and it helps prepare for invariants. We make decisions only when all the information is at hand for the more flexible (and more decisive) part of the input. Even if the response time of the first few requests is high, these serve as "teaching" exercises for the subsequent ones. Tools like code generation and data virtualization help make JIT useful in data management. I hope that our community will build many JIT systems and benefit from the dynamic nature of this philosophy.
As many computer scientists do, I routinely use what I learn in my research to optimize performance in a multi-dimensionally unpredictable everyday life, and vice versa. I've built systems by mapping design choices to life challenges, and have tried to relate to my students' personalities and help them overcome hurdles while filtering through my (often boring, but hopefully useful) personal experiences. In my talk I will share some of these experiences, intertwined with exciting research directions.
I am humbled and grateful to receive the VLDB Women in Database Research award, and I thank the community for this distinction.
Die Hiatregel in den Jamben von Gregor von Nazianz
Authors: De Stefani Claudio 
Published: September 2020

Abstract
In the Iambs of Gregory of Nazianzus occur many hiatuses: this might suggest that his verses had been composed with carelessness. In fact, if we examine the various kinds of hiatuses, we notice that some of them should not be considered as such, because they occur after words, or along with iuncturae, that usually admit them. There remains, however, a considerable number of hiatus in caesura. The article strives to demonstrate that these hiatuses are due to the imitation of the well-known hiatus in trocaic caesura in the hexameter, which was allowed since Homer’s age. As a matter of fact, in some cases, the same words that produce a hiatus after a trochaic caesura in Homer show an identical one after a caesura in Gregory’s trimeters. Moreover, hexameter and iambic trimeter were frequently juxtaposed by the late ancient metric-grammatical tradition. The article further analyzes the occurence of the hiatus in caesura in the Byzantine dodecasyllables, which, among other reasons, might be due also to the influence of Gregory in Byzantine poetry.
Old statues, new meanings. Literary, epigraphic and archaeological evidence for Christian reidentification of statuary
Authors: Jacobs Ine 
Published: September 2020

Abstract
This article examines literary, epigraphic and archaeological evidence for the Christian reidentification of statuary and reliefs as biblical scenes and protagonists, saints and angels. It argues that Christian identifications were promulgated, amongst others by local bishops, to make sense of imagery of which the original identity had been lost and/or was no longer meaningful. Three conditions for a new identification are discussed: the absence of an epigraphic label, geographical and/or chronological distance separating the statue from its original context of display, and the presence of a specific attribute or characteristic that could become the prompt for reidentification. In their manipulation and modernization of older statuary, Christians showed a much greater appreciation of the statuary medium than generally assumed.
Breaking silence in the historiography of Procopius of Caesarea
Authors: Pazdernik Charles F. 
Published: September 2020

Abstract
Procopius employs the motif of “grieving in silence” to describe the deliberations preceding Justinian’s invasion of Vandal North Africa in 533 (Wars 3.10.7-8) and his vendetta against the urban prefect of Constantinople in 523 (HA 9.41). The particularity of Procopius’ language in these passages makes their collocation especially pronounced. The distance between the Wars and the Secret History, which represents itself breaking the silence between what the Wars can state publicly and the unvarnished truth (HA 1.1-10), may be measured by two “wise advisers” who speak when others are silent: the quaestor Proclus, warmly remembered for his probity, and the praetorian prefect John the Cappadocian, a figure universally reviled. Discontinuities between the presentation of John in the Wars and the merits of the policies he endorses problematize readers’ impressions of not only John but also the relationship between the Wars and the historical reality the work claims to represent.
The Byzantine reception of Aristotle’s Rhetoric: the 12th century Renaissance
Authors: Vogiatzi Melpomeni 
Published: September 2020

Abstract
In this paper, I argue that, after centuries of neglect, a revival of interest towards Aristotle’s Rhetoric took place in 12th century Constantinople, which led to the production of a number of commentaries. In order to give an overview of the commentary tradition on the Rhetoric, I examine first the surviving extant commentaries themselves, then the information that the commentators offer regarding their preceding interpretations, and last the traces of commentaries on the Rhetoric found in other treatises. This examination will show that, at least within a specific group of scholars, the Rhetoric was studied and commented upon like never before. Finally, I attempt to explain this revival of interest, especially with respect to the role that philosophical and rhetorical education played in 12th century Byzantium.
Blending is creative, but blendedness is not — a response to Mark Turner
Authors: Herbst Thomas 
Published: September 2020

AbstractThis short response to Mark Turner’s article on “Construction and creativity” takes the idea of blending — which is at the centre of Turner’s argument — a step further and shows how it can be applied to syntactic analysis. Furthermore, it distinguishes between blendedness and blending, discussing the relevance of these concepts with respect to their relevance with respect to linguistic creativity.
Optimal fault location for power distribution systems with distributed generations using synchronized measurements
Authors: Fan Wen , Liao Yuan , kang Ning 
Published: September 2020

Abstract
Accurate fault location in distribution systems greatly shortens maintenance time and improves reliability. This paper presents novel methods to pinpoint fault location and identify possible bad measurements for enhanced accuracy. It is assumed that network parameters and topology of the distribution network are available. The methods are applicable to a single fault as well as simultaneous faults and are applicable to both balanced and unbalanced networks. The methods utilize synchronized voltage and current phasor measurements to locate the fault. The methods are validated by simulation studies using the modified IEEE 34-Node Test System. Case studies have demonstrated that the methods are suitable for distribution systems with high penetration of distributed generations.
A contextual analysis of crossing the ball in soccer
Authors: Wu Lucas Y. , Danielson Aaron J. , Hu X. Joan , Swartz Tim B. 
Published: September 2020

Abstract
The action of crossing the ball in soccer has a long history as an effective tactic for producing goals. Lately, the benefit of crossing the ball has come under question, and alternative strategies have been suggested. This paper utilizes player tracking data to explore crossing at a deeper level. First, we investigate the spatio-temporal conditions that lead to crossing. Then we introduce an intended target model that investigates crossing success. Finally, a contextual analysis is provided that assesses the benefits of crossing in various situations. The analysis is based on causal inference techniques and suggests that crossing remains an effective tactic in particular contexts.
Existence and Multiplicity of Weak Solutions for a Neumann Elliptic Problem with -Laplacian
Authors: Bohner Martin , Caristi Giuseppe , Gharehgazlouei Fariba , Heidarkhani Shapour 
Published: September 2020

AbstractWe are interested in the existence of multiple weak solutions for the Neumann elliptic problem involving the anisotropic-Laplacian operator, on a bounded domain with smooth boundary. We work on the anisotropic variable exponent Sobolev space, and by using a consequence of the local minimum theorem due to Bonanno, we establish existence of at least one weak solution under algebraic conditions on the nonlinear term. Also, we discuss existence of at least two weak solutions for the problem, under algebraic conditions including the classical Ambrosetti–Rabinowitz condition on the nonlinear term. Furthermore, by employing a three critical point theorem due to Bonanno and Marano, we guarantee the existence of at least three weak solutions for the problem in a special case.
Chloride-induced corrosion behavior of reinforced cement mortar with MWCNTs
Authors: Li Weiwen , Liu Yi , Jiang Zhilu , Fang Yiqin , Zhan Nianrong , Long Wujian , Xing Feng 
Published: September 2020

Abstract
The use of multi-walled carbon nanotubes (MWC-NTs), as excellent mechanical and conductive fibers, for making self-sensing cementitious composites has attracted great interest. However, few researches have focused on the durability of mortar with MWCNTs. This paper attempts to explore the corrosion of embedded steel rebar in cement mortar with different contents of MWC-NTs. Tests for compressive strength, chloride migration coefficient, conductivity, and corrosion behaviors of MWCNT-cement mortar were carried out. The results show that the addition of MWCNTs to the cement mortar accelerated the development of the steel corrosion under chloride environment. The migration behavior of chlorine ions and steel corrosion rate were related to the carbon nanotube content. The increase in carbon nanotube content resulted in higher steel corrosion intensities. Moreover, the rates of chloride transport into the mortar increased with the nanotube content under both accelerated and natural chloride conditions.
Über die Annahme der zeitlichen Veränderlichkeit des β-Zerfalls und die Möglichkeiten ihrer experimentellen Prüfung
Authors: Houtermans F. G. , Jordan P. 
Published: September 2020

Im ersten Abschnitt wird das auf Grund der Dirac - Jordan sehen kosmologischen Annahme zu erwartende Zerfallsgesetz für ß-Zerfall und K-Einfang abgeleitet, unter Korrektur eines 1. c.2 unterlaufenen Vorzeichenfehlers. Es werden sodann Möglichkeiten der experimentellen Prüfung der Annahme einer zeitlichen Änderung des ß-Zerfalls diskutiert. Im zweiten Abschnitt wird die V. Weizsäcker sehe Annahme, daß das auf der Erde vorhandene Argonisotop 40 durch K-Einfang von K40 entstanden ist, diskutiert, und die Halbwertszeit dieses Prozesses abgeschätzt unter der Annahme, daß für den Vorrat von A40 in der Atmosphäre die Kaliummenge in demjenigen Teil der Erdrinde verantwortlich ist. der im Laufe der Erdgeschichte den Vorgängen der Verwitterung und Sedimentbildung unterworfen war. Als Ergebnis wird unter Annahme der Halbwertszeit des K40 für ß-Zerfall von T = 1,42 . 109 a das Verhältnis k von K-Einfang zum Gesamtzerfall des K40 als Funktion des Alters der Atmosphäre gegeben. Für ein Alter der Atmosphäre von 3,5 . 109 a ergibt sich k = 0,56 nach dem klassischen Zerfallsgesetz, nach (2), wenn das Weltalter als praktisch ebenso groß angesehen wird, k = 0,26. Ferner wird festgestellt, daß unter der erwähnten geologischen Annahme der von Thompson und Rowlands gegebene experimentelle Wert von k = 0,78 zu einem sicher zu kleinen Maximalwert des Alters der Atmosphäre von 1,6 . 109 a schon nach dem klassischen Zerfallsgesetz führt.
Im dritten Abschnitt wurden Konsequenzen des Zerfallsgesetzes (2) für Altersbestimmungen nach der Rubidium-Strontium-Methode diskutiert. Hierbei wird festgestellt, daß dieses Zerfallsgesetz experimentell mit den chemischen Befunden von Hahn und Mitarbeitern an einigen Mineralien verträglich ist, wenn eine durch Messungen von Mühlhoff und dem einen von uns bestätigte Halbwertszeit von Rb87 von T = 0,9 . 1011 a und das Weltalter im Einklang mit dem Befund aus dem Hubble - Effektzut = 2,4 . 10® a angenommen wird. Das Alter des von H a h n und Mitarbeitern untersuchten Polluzits von Varuträsk ergibt sich dann höher, nämlich zu 680 statt 530 Millionen Jahren.
Im letzten Abschnitt wird auf die prinzipielle Möglichkeit hingewiesen, aus den Intensitätsverhältnissen sehr alter pleochroitiseher und Verfärbungshöfe von Körpern der Thoriumreihe Schlüsse über die Konstanz des ß-Zerfalls zu ziehen
Die Aktivierung der seltenen Erden durch thermische Neutronen II
Authors: Bothe Walther 
Published: September 2020

Abstract
Entsprechende Untersuchungen, wie früher für Tm, Yb und Cp beschrieben2, wurden an folgenden Elementen angestellt: Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er. Die erhaltenen Aktivitäten sind in Tab. 1 verzeichnet. Praktische Intensitätsangaben und rohe Werte der Aktivierungsquerschnitte mit thermischen Neutronen für alle Erden (außer Gd) finden sich am Schluß in Tab. 2.
Quantentheorie der Feldmechanik
Authors: Bopp Fritz 
Published: September 2020

Abstract
Die früher abgeleiteten Bewegungsgleichungen der Feldmechanik werden - zunächst ohne Berücksichtigung der Strahlungskraft - nach dem Retardierungsparameter entwickelt, und zwar einen Schritt weiter als in der Lorentzsehen Theorie des Elektrons. Die resultierenden Bewegungsgleichungen enthalten neue Freiheitsgrade, die eine Zitterbewegung beschreiben und bereits im klassischen Bereich zu spinartigen Drehimpulszusätzen Anlaß geben. Der formale Ubergang zur Quantenmechanik macht keine Schwierigkeit und führt zu einer Wellengleichung vom Dirac sehen Typ allerdings derart, daß zunächst nur Lösungen mit ganzzahligem Spin möglich sind und daß im allgemeinen eine starke Kopplung besteht zwischen Lösungen, die zu verschiedenem Spin gehören. Der Spezialfall des kräfte- und impulsfreien Teilchens wird besonders untersucht. Die Wellengleichung vereinfacht sich, wird aber keineswegs trivial. Ihre Eigenlösungen geben Zustände des Elementarteilchens, die zu verschiedenen Massen- und Spinwerten gehören, fassen also prinzipiell die Gesamtheit der Elementarteilchen in einer Wellengleichung zusammen. Quantitativ sind die Ergebnisse in der vorliegenden Näherung noch unbefriedigend. Die Art der Abweichung von den wirklichen Verhältnissen liegt nach früheren Untersuchungen an der Näherung und ist von vornherein zu erwarten.